Website build Hono-Website-Declarative-Pipeline-295

Signed-off-by: Hono Bot <hono-bot@eclipse.org>
diff --git a/docs/1.4/404.html b/docs/1.4/404.html
index 8c96eba..f5cc13d 100644
--- a/docs/1.4/404.html
+++ b/docs/1.4/404.html
@@ -18,15 +18,15 @@
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-    <link href="/hono/docs/css/theme.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225108" rel="stylesheet">
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+    <link href="/hono/docs/css/hybrid.css?1626225108" rel="stylesheet">
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+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225108" rel="stylesheet">
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-      <link href="/hono/docs/css/theme-hono.css?1626138728" rel="stylesheet">
+      <link href="/hono/docs/css/theme-hono.css?1626225108" rel="stylesheet">
     
 <style>
     :root #header + #content > #left > #rlblock_left {
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index 57d0379..e5b53bb 100644
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+++ b/docs/1.4/admin-guide/amqp-adapter-config/index.html
@@ -21,21 +21,21 @@
     <title>AMQP Adapter Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
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-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
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+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
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+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
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-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
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+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
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-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
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@@ -1486,6 +1520,8 @@
                   
               
                   
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                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/amqp-adapter-config/">1.8</option>
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                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/amqp-adapter-config/">1.7</option>
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                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/amqp-adapter-config/">1.6</option>
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@@ -1646,6 +1690,8 @@
                   
               
                   
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                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/amqp-adapter-config/">1.3</option>
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                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/amqp-adapter-config/">1.2</option>
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                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/amqp-adapter-config/">1.1</option>
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                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/amqp-adapter-config/">1.0</option>
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+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
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-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
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-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
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     <script>
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diff --git a/docs/1.4/admin-guide/amqp-network-config/index.html b/docs/1.4/admin-guide/amqp-network-config/index.html
index cc9bb3f..fb8e43c 100644
--- a/docs/1.4/admin-guide/amqp-network-config/index.html
+++ b/docs/1.4/admin-guide/amqp-network-config/index.html
@@ -21,21 +21,21 @@
     <title>AMQP 1.0 Messaging Network Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
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-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
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+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
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@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
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+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/amqp-network-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/amqp-network-config/">stable (1.9)</option>
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+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/amqp-network-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
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                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/amqp-network-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
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                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/amqp-network-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
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                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/amqp-network-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
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                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/amqp-network-config/">1.5</option>
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                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/amqp-network-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
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                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/amqp-network-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
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                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/amqp-network-config/">1.2</option>
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                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/amqp-network-config/">1.1</option>
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                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/amqp-network-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
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                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/amqp-network-config/">dev</option>
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-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
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diff --git a/docs/1.4/admin-guide/auth-server-config/index.html b/docs/1.4/admin-guide/auth-server-config/index.html
index 350a3b4..095ea92 100644
--- a/docs/1.4/admin-guide/auth-server-config/index.html
+++ b/docs/1.4/admin-guide/auth-server-config/index.html
@@ -21,21 +21,21 @@
     <title>Auth Server Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
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-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
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-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
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@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/auth-server-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/auth-server-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/auth-server-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/auth-server-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/auth-server-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/auth-server-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/auth-server-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/auth-server-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/auth-server-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/auth-server-config/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/auth-server-config/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/auth-server-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/auth-server-config/">dev</option>
@@ -3092,19 +3146,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/admin-guide/coap-adapter-config/index.html b/docs/1.4/admin-guide/coap-adapter-config/index.html
index f1e4339..8294e31 100644
--- a/docs/1.4/admin-guide/coap-adapter-config/index.html
+++ b/docs/1.4/admin-guide/coap-adapter-config/index.html
@@ -21,21 +21,21 @@
     <title>CoAP Adapter Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/coap-adapter-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/coap-adapter-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/coap-adapter-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/coap-adapter-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/coap-adapter-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/coap-adapter-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/coap-adapter-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/coap-adapter-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/coap-adapter-config/">1.3</option>
@@ -1684,6 +1730,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/coap-adapter-config/">dev</option>
@@ -3059,19 +3107,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138726"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138726"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138726"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138726"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138726"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138726"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138726"></script>
-    <script src="/hono/docs/js/learn.js?1626138726"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138726"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138726" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138726"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/admin-guide/common-config/index.html b/docs/1.4/admin-guide/common-config/index.html
index 631b080..9b7b7de 100644
--- a/docs/1.4/admin-guide/common-config/index.html
+++ b/docs/1.4/admin-guide/common-config/index.html
@@ -21,21 +21,21 @@
     <title>Common Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/common-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/common-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/common-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/common-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/common-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/common-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/common-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/common-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/common-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/common-config/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/common-config/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/common-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/common-config/">dev</option>
@@ -3172,19 +3226,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/admin-guide/device-connection-config/index.html b/docs/1.4/admin-guide/device-connection-config/index.html
index ecdddb7..d36b8d9 100644
--- a/docs/1.4/admin-guide/device-connection-config/index.html
+++ b/docs/1.4/admin-guide/device-connection-config/index.html
@@ -21,21 +21,21 @@
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-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
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+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
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+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
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@@ -83,14 +83,14 @@
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-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/device-connection-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/device-connection-config/">stable (1.9)</option>
+                    
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@@ -1486,6 +1520,8 @@
                   
               
                   
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                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/device-connection-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/device-connection-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
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@@ -1582,6 +1622,8 @@
                   
               
                   
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                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/device-connection-config/">1.5</option>
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@@ -1646,6 +1690,8 @@
                   
               
                   
+              
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                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/device-connection-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
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                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/device-connection-config/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
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                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/device-connection-config/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
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                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/device-connection-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
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@@ -3195,19 +3249,19 @@
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-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
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+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
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-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
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-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
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diff --git a/docs/1.4/admin-guide/device-registry-config/index.html b/docs/1.4/admin-guide/device-registry-config/index.html
index f85e1e6..ff118cf 100644
--- a/docs/1.4/admin-guide/device-registry-config/index.html
+++ b/docs/1.4/admin-guide/device-registry-config/index.html
@@ -21,21 +21,21 @@
     <title>Device Registry Configurations :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
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-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
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-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/device-registry-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/device-registry-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/device-registry-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/device-registry-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/device-registry-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/device-registry-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/device-registry-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/device-registry-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/device-registry-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/device-registry-config/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/device-registry-config/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/device-registry-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/device-registry-config/">dev</option>
@@ -2910,19 +2964,19 @@
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       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138726"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138726"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138726"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138726"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138726"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138726"></script>
-    <script src="/hono/docs/js/learn.js?1626138726"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138726"></script>
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+    <script src="/hono/docs/js/learn.js?1626225107"></script>
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-    <link href="/hono/docs/mermaid/mermaid.css?1626138726" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138726"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
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diff --git a/docs/1.4/admin-guide/file-based-device-registry-config/index.html b/docs/1.4/admin-guide/file-based-device-registry-config/index.html
index 9d0c751..61345f2 100644
--- a/docs/1.4/admin-guide/file-based-device-registry-config/index.html
+++ b/docs/1.4/admin-guide/file-based-device-registry-config/index.html
@@ -21,21 +21,21 @@
     <title>File Based Device Registry Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
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-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
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-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/file-based-device-registry-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/file-based-device-registry-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/file-based-device-registry-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/file-based-device-registry-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/file-based-device-registry-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/file-based-device-registry-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/file-based-device-registry-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/file-based-device-registry-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/file-based-device-registry-config/">1.3</option>
@@ -1684,6 +1730,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/file-based-device-registry-config/">dev</option>
@@ -3321,19 +3369,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/admin-guide/hono-client-configuration/index.html b/docs/1.4/admin-guide/hono-client-configuration/index.html
index 87863bf..9036bae 100644
--- a/docs/1.4/admin-guide/hono-client-configuration/index.html
+++ b/docs/1.4/admin-guide/hono-client-configuration/index.html
@@ -21,21 +21,21 @@
     <title>Hono Client Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/hono-client-configuration/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/hono-client-configuration/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/hono-client-configuration/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/hono-client-configuration/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/hono-client-configuration/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/hono-client-configuration/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/hono-client-configuration/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/hono-client-configuration/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/hono-client-configuration/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/hono-client-configuration/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/hono-client-configuration/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/hono-client-configuration/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/hono-client-configuration/">dev</option>
@@ -3176,19 +3230,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/admin-guide/http-adapter-config/index.html b/docs/1.4/admin-guide/http-adapter-config/index.html
index 351d45c..61566b4 100644
--- a/docs/1.4/admin-guide/http-adapter-config/index.html
+++ b/docs/1.4/admin-guide/http-adapter-config/index.html
@@ -21,21 +21,21 @@
     <title>HTTP Adapter Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/http-adapter-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/http-adapter-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/http-adapter-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/http-adapter-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/http-adapter-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/http-adapter-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/http-adapter-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/http-adapter-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/http-adapter-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/http-adapter-config/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/http-adapter-config/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/http-adapter-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/http-adapter-config/">dev</option>
@@ -3084,19 +3138,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/admin-guide/index.html b/docs/1.4/admin-guide/index.html
index 43a2b35..77676a0 100644
--- a/docs/1.4/admin-guide/index.html
+++ b/docs/1.4/admin-guide/index.html
@@ -21,21 +21,21 @@
     <title>Admin Guide :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
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+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
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@@ -83,14 +83,14 @@
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 </div>
 
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-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
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+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/">stable (1.8)</option>
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@@ -1486,6 +1520,8 @@
                   
               
                   
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                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
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                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
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@@ -1614,6 +1656,8 @@
                   
               
                   
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                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
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                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
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                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
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                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
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                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
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                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/">dev</option>
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-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
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+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
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+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
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     </script>
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index 70bfc0a..9744f54 100644
--- a/docs/1.4/admin-guide/kura-adapter-config/index.html
+++ b/docs/1.4/admin-guide/kura-adapter-config/index.html
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     <title>Kura Adapter Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
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-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
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-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/kura-adapter-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/kura-adapter-config/">stable (1.9)</option>
+                    
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+              
+          
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+                  
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+                    
+                    
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@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/kura-adapter-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/kura-adapter-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/kura-adapter-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
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                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/kura-adapter-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/kura-adapter-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
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                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/kura-adapter-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/kura-adapter-config/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/kura-adapter-config/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/kura-adapter-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/kura-adapter-config/">dev</option>
@@ -3109,19 +3163,19 @@
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     </div>
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
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diff --git a/docs/1.4/admin-guide/mongodb-device-registry-config/index.html b/docs/1.4/admin-guide/mongodb-device-registry-config/index.html
index 8c922e3..093921a 100644
--- a/docs/1.4/admin-guide/mongodb-device-registry-config/index.html
+++ b/docs/1.4/admin-guide/mongodb-device-registry-config/index.html
@@ -21,21 +21,21 @@
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-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
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-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/mongodb-device-registry-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/mongodb-device-registry-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/mongodb-device-registry-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/mongodb-device-registry-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/mongodb-device-registry-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/mongodb-device-registry-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/mongodb-device-registry-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/mongodb-device-registry-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/mongodb-device-registry-config/">1.3</option>
@@ -1684,6 +1730,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/mongodb-device-registry-config/">dev</option>
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-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
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-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/admin-guide/monitoring-tracing-config/index.html b/docs/1.4/admin-guide/monitoring-tracing-config/index.html
index e4fa865..6bc4467 100644
--- a/docs/1.4/admin-guide/monitoring-tracing-config/index.html
+++ b/docs/1.4/admin-guide/monitoring-tracing-config/index.html
@@ -21,21 +21,21 @@
     <title>Monitoring & Tracing :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/monitoring-tracing-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/monitoring-tracing-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/monitoring-tracing-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/monitoring-tracing-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/monitoring-tracing-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/monitoring-tracing-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/monitoring-tracing-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/monitoring-tracing-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/monitoring-tracing-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/monitoring-tracing-config/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/monitoring-tracing-config/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/monitoring-tracing-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/monitoring-tracing-config/">dev</option>
@@ -3072,19 +3126,19 @@
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
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     </script>
diff --git a/docs/1.4/admin-guide/mqtt-adapter-config/index.html b/docs/1.4/admin-guide/mqtt-adapter-config/index.html
index a7a0b56..7730a34 100644
--- a/docs/1.4/admin-guide/mqtt-adapter-config/index.html
+++ b/docs/1.4/admin-guide/mqtt-adapter-config/index.html
@@ -21,21 +21,21 @@
     <title>MQTT Adapter Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/mqtt-adapter-config/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/mqtt-adapter-config/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/mqtt-adapter-config/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/mqtt-adapter-config/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/mqtt-adapter-config/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/mqtt-adapter-config/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/mqtt-adapter-config/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/mqtt-adapter-config/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/mqtt-adapter-config/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/mqtt-adapter-config/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/mqtt-adapter-config/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/mqtt-adapter-config/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/mqtt-adapter-config/">dev</option>
@@ -3136,19 +3190,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/admin-guide/secure_communication/index.html b/docs/1.4/admin-guide/secure_communication/index.html
index 54c8b5b..d390cda 100644
--- a/docs/1.4/admin-guide/secure_communication/index.html
+++ b/docs/1.4/admin-guide/secure_communication/index.html
@@ -21,21 +21,21 @@
     <title>Secure Communication :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/secure_communication/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/secure_communication/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/admin-guide/secure_communication/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/secure_communication/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/secure_communication/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/secure_communication/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/secure_communication/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/secure_communication/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/secure_communication/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/secure_communication/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/secure_communication/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/secure_communication/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/secure_communication/">dev</option>
@@ -3207,19 +3261,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/authentication/index.html b/docs/1.4/api/authentication/index.html
index d298652..21c09ec 100644
--- a/docs/1.4/api/authentication/index.html
+++ b/docs/1.4/api/authentication/index.html
@@ -21,21 +21,21 @@
     <title>Authentication API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/authentication/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/authentication/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/authentication/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/authentication/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/authentication/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/authentication/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/authentication/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/authentication/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/authentication/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/authentication/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/authentication/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/authentication/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/authentication/">dev</option>
@@ -3037,19 +3091,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/command-and-control/index.html b/docs/1.4/api/command-and-control/index.html
index 8badd41..fd35fe6 100644
--- a/docs/1.4/api/command-and-control/index.html
+++ b/docs/1.4/api/command-and-control/index.html
@@ -21,21 +21,21 @@
     <title>Command & Control API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/command-and-control/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/command-and-control/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/command-and-control/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/command-and-control/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/command-and-control/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/command-and-control/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/command-and-control/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/command-and-control/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/command-and-control/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/command-and-control/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/command-and-control/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/command-and-control/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/command-and-control/">dev</option>
@@ -3221,19 +3275,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/credentials/index.html b/docs/1.4/api/credentials/index.html
index 9bbac9e..f8a5899 100644
--- a/docs/1.4/api/credentials/index.html
+++ b/docs/1.4/api/credentials/index.html
@@ -21,21 +21,21 @@
     <title>Credentials API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/credentials/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/credentials/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/credentials/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/credentials/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/credentials/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/credentials/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/credentials/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/credentials/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/credentials/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/credentials/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/credentials/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/credentials/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/credentials/">dev</option>
@@ -3451,19 +3505,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/device-connection/index.html b/docs/1.4/api/device-connection/index.html
index 9bf163b..3e1c1ca 100644
--- a/docs/1.4/api/device-connection/index.html
+++ b/docs/1.4/api/device-connection/index.html
@@ -21,21 +21,21 @@
     <title>Device Connection API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/device-connection/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/device-connection/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/device-connection/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/device-connection/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/device-connection/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/device-connection/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/device-connection/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/device-connection/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/device-connection/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/device-connection/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/device-connection/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/device-connection/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/device-connection/">dev</option>
@@ -3544,19 +3598,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/device-registration/index.html b/docs/1.4/api/device-registration/index.html
index 4af1a6c..9e55c50 100644
--- a/docs/1.4/api/device-registration/index.html
+++ b/docs/1.4/api/device-registration/index.html
@@ -21,21 +21,21 @@
     <title>Device Registration API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/device-registration/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/device-registration/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/device-registration/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/device-registration/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/device-registration/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/device-registration/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/device-registration/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/device-registration/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/device-registration/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/device-registration/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/device-registration/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/device-registration/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/device-registration/">dev</option>
@@ -3137,19 +3191,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/event/index.html b/docs/1.4/api/event/index.html
index 12af0a2..ce05c7b 100644
--- a/docs/1.4/api/event/index.html
+++ b/docs/1.4/api/event/index.html
@@ -21,21 +21,21 @@
     <title>Event API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/event/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/event/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/event/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/event/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/event/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/event/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/event/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/event/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/event/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/event/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/event/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/event/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/event/">dev</option>
@@ -3103,19 +3157,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/index.html b/docs/1.4/api/index.html
index 522f8da..68590d0 100644
--- a/docs/1.4/api/index.html
+++ b/docs/1.4/api/index.html
@@ -21,21 +21,21 @@
     <title>API :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/">dev</option>
@@ -2897,19 +2951,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/management/index.html b/docs/1.4/api/management/index.html
index e60fa63..84181db 100644
--- a/docs/1.4/api/management/index.html
+++ b/docs/1.4/api/management/index.html
@@ -21,21 +21,21 @@
     <title>Device Registry Management API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -86,14 +86,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1459,7 +1459,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/management/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/management/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/management/">1.9</option>
                     
                   
               
@@ -1489,6 +1523,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/management/">1.8</option>
@@ -1521,6 +1557,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/management/">1.7</option>
@@ -1553,6 +1591,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/management/">1.6</option>
@@ -1585,6 +1625,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/management/">1.5</option>
@@ -1617,6 +1659,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/management/" selected>1.4</option>
@@ -1649,6 +1693,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/management/">1.3</option>
@@ -1681,6 +1727,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/management/">1.2</option>
@@ -1713,6 +1761,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/management/">1.1</option>
@@ -1745,6 +1795,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/management/">1.0</option>
@@ -1777,6 +1829,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/management/">dev</option>
@@ -2958,19 +3012,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/metrics/index.html b/docs/1.4/api/metrics/index.html
index 17498a8..51aa284 100644
--- a/docs/1.4/api/metrics/index.html
+++ b/docs/1.4/api/metrics/index.html
@@ -21,21 +21,21 @@
     <title>Metrics :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/metrics/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/metrics/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/metrics/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/metrics/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/metrics/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/metrics/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/metrics/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/metrics/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/metrics/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/metrics/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/metrics/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/metrics/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/metrics/">dev</option>
@@ -3179,19 +3233,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/telemetry/index.html b/docs/1.4/api/telemetry/index.html
index b050fdb..bd9c0b0 100644
--- a/docs/1.4/api/telemetry/index.html
+++ b/docs/1.4/api/telemetry/index.html
@@ -21,21 +21,21 @@
     <title>Telemetry API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138726" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225106" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225106" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138726" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225106" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138726"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225106"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138726"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225106"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225106"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138726"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225106"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/telemetry/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/telemetry/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/telemetry/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/telemetry/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/telemetry/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/telemetry/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/telemetry/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/telemetry/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/telemetry/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/telemetry/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/telemetry/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/telemetry/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/telemetry/">dev</option>
@@ -3074,19 +3128,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/tenant/index.html b/docs/1.4/api/tenant/index.html
index 17d9a1f..b8104e5 100644
--- a/docs/1.4/api/tenant/index.html
+++ b/docs/1.4/api/tenant/index.html
@@ -21,21 +21,21 @@
     <title>Tenant API Specification :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/tenant/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/tenant/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/api/tenant/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/tenant/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/tenant/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/tenant/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/tenant/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/tenant/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/tenant/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/tenant/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/tenant/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/tenant/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/tenant/">dev</option>
@@ -3524,19 +3578,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/architecture/auth/index.html b/docs/1.4/architecture/auth/index.html
index 18d58f3..e1da7ff 100644
--- a/docs/1.4/architecture/auth/index.html
+++ b/docs/1.4/architecture/auth/index.html
@@ -21,21 +21,21 @@
     <title>Authentication/Authorization :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/auth/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/auth/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/architecture/auth/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/architecture/auth/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/architecture/auth/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/architecture/auth/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/architecture/auth/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/architecture/auth/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/architecture/auth/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/architecture/auth/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/architecture/auth/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/architecture/auth/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/architecture/auth/">dev</option>
@@ -2952,19 +3006,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/architecture/component-view/index.html b/docs/1.4/architecture/component-view/index.html
index d7d15da..37517e2 100644
--- a/docs/1.4/architecture/component-view/index.html
+++ b/docs/1.4/architecture/component-view/index.html
@@ -21,21 +21,21 @@
     <title>Component View :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/component-view/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/component-view/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/architecture/component-view/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/architecture/component-view/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/architecture/component-view/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/architecture/component-view/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/architecture/component-view/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/architecture/component-view/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/architecture/component-view/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/architecture/component-view/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/architecture/component-view/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/architecture/component-view/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
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@@ -2955,19 +3009,19 @@
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-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
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-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
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+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
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diff --git a/docs/1.4/architecture/index.html b/docs/1.4/architecture/index.html
index fb50297..2d15f58 100644
--- a/docs/1.4/architecture/index.html
+++ b/docs/1.4/architecture/index.html
@@ -21,21 +21,21 @@
     <title>Architecture :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
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-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
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-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/">stable (1.9)</option>
+                    
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+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
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+              
+                  
+              
+                  
+              
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+              
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+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/architecture/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/architecture/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/architecture/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/architecture/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/architecture/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/architecture/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/architecture/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/architecture/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/architecture/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/architecture/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/architecture/">dev</option>
@@ -2896,19 +2950,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
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     </div>
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
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diff --git a/docs/1.4/categories/index.html b/docs/1.4/categories/index.html
index 9d34973..aec3173 100644
--- a/docs/1.4/categories/index.html
+++ b/docs/1.4/categories/index.html
@@ -21,21 +21,21 @@
     <title>Categories :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225108" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138728"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225108"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138728"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138728"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225108"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225108"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138728"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225108"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/categories/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/categories/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/categories/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/categories/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/categories/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/categories/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/categories/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/categories/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/categories/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/categories/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/categories/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/categories/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/categories/">dev</option>
@@ -2893,19 +2947,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
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     </div>
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
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diff --git a/docs/1.4/concepts/command-and-control/index.html b/docs/1.4/concepts/command-and-control/index.html
index ce4c95a..440ddd9 100644
--- a/docs/1.4/concepts/command-and-control/index.html
+++ b/docs/1.4/concepts/command-and-control/index.html
@@ -21,21 +21,21 @@
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-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
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-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/command-and-control/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/command-and-control/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/command-and-control/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/command-and-control/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/command-and-control/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/command-and-control/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/command-and-control/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/command-and-control/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/command-and-control/">1.3</option>
@@ -1684,6 +1730,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/command-and-control/">dev</option>
@@ -2938,19 +2986,19 @@
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       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
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-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/connecting-devices/index.html b/docs/1.4/concepts/connecting-devices/index.html
index e6d6a76..3d54bd9 100644
--- a/docs/1.4/concepts/connecting-devices/index.html
+++ b/docs/1.4/concepts/connecting-devices/index.html
@@ -21,21 +21,21 @@
     <title>Connecting Devices :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/connecting-devices/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/connecting-devices/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/connecting-devices/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/connecting-devices/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/connecting-devices/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/connecting-devices/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/connecting-devices/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/connecting-devices/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/connecting-devices/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/connecting-devices/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/connecting-devices/">1.1</option>
@@ -1744,6 +1794,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/connecting-devices/">dev</option>
@@ -3009,19 +3061,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/connection-events/index.html b/docs/1.4/concepts/connection-events/index.html
index f8c342a..b667f9d 100644
--- a/docs/1.4/concepts/connection-events/index.html
+++ b/docs/1.4/concepts/connection-events/index.html
@@ -21,21 +21,21 @@
     <title>Connection Events :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/connection-events/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/connection-events/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/connection-events/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/connection-events/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/connection-events/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/connection-events/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/connection-events/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/connection-events/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/connection-events/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/connection-events/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/connection-events/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/concepts/connection-events/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/connection-events/">dev</option>
@@ -2931,19 +2985,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
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     </script>
diff --git a/docs/1.4/concepts/device-identity/index.html b/docs/1.4/concepts/device-identity/index.html
index 18b698d..90d251f 100644
--- a/docs/1.4/concepts/device-identity/index.html
+++ b/docs/1.4/concepts/device-identity/index.html
@@ -21,21 +21,21 @@
     <title>Device Identity :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-identity/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-identity/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/device-identity/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/device-identity/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/device-identity/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/device-identity/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/device-identity/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/device-identity/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/device-identity/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/device-identity/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/device-identity/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/concepts/device-identity/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/device-identity/">dev</option>
@@ -2935,19 +2989,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/device-notifications/index.html b/docs/1.4/concepts/device-notifications/index.html
index a03f7a5..486fc57 100644
--- a/docs/1.4/concepts/device-notifications/index.html
+++ b/docs/1.4/concepts/device-notifications/index.html
@@ -21,21 +21,21 @@
     <title>Device Notifications :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-notifications/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-notifications/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/device-notifications/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/device-notifications/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/device-notifications/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/device-notifications/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/device-notifications/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/device-notifications/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/device-notifications/">1.3</option>
@@ -1684,6 +1730,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/device-notifications/">dev</option>
@@ -2907,19 +2955,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/device-provisioning/index.html b/docs/1.4/concepts/device-provisioning/index.html
index 23d3ed0..81ab39d 100644
--- a/docs/1.4/concepts/device-provisioning/index.html
+++ b/docs/1.4/concepts/device-provisioning/index.html
@@ -21,21 +21,21 @@
     <title>Device Provisioning :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-provisioning/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-provisioning/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/device-provisioning/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/device-provisioning/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/device-provisioning/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/device-provisioning/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/device-provisioning/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/device-provisioning/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/device-provisioning/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/device-provisioning/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/device-provisioning/">1.1</option>
@@ -1744,6 +1794,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/device-provisioning/">dev</option>
@@ -2946,19 +2998,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/index.html b/docs/1.4/concepts/index.html
index 31d022d..7c4cdbc 100644
--- a/docs/1.4/concepts/index.html
+++ b/docs/1.4/concepts/index.html
@@ -21,21 +21,21 @@
     <title>Concepts :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225108" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138728"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225108"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138728"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138728"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225108"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225108"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138728"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225108"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/concepts/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/">dev</option>
@@ -2893,19 +2947,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/resource-limits/index.html b/docs/1.4/concepts/resource-limits/index.html
index f7512d7..5a46465 100644
--- a/docs/1.4/concepts/resource-limits/index.html
+++ b/docs/1.4/concepts/resource-limits/index.html
@@ -21,21 +21,21 @@
     <title>Resource limits :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/resource-limits/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/resource-limits/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/resource-limits/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/resource-limits/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/resource-limits/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/resource-limits/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/resource-limits/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/resource-limits/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/resource-limits/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/resource-limits/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/resource-limits/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/concepts/resource-limits/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/resource-limits/">dev</option>
@@ -2969,19 +3023,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/tenancy/index.html b/docs/1.4/concepts/tenancy/index.html
index d083664..81bc7f0 100644
--- a/docs/1.4/concepts/tenancy/index.html
+++ b/docs/1.4/concepts/tenancy/index.html
@@ -21,21 +21,21 @@
     <title>Multi-Tenancy :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/tenancy/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/tenancy/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/concepts/tenancy/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/tenancy/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/tenancy/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/tenancy/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/tenancy/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/tenancy/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/tenancy/">1.3</option>
@@ -1684,6 +1730,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/tenancy/">dev</option>
@@ -2928,19 +2976,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/deployment/create-kubernetes-cluster/index.html b/docs/1.4/deployment/create-kubernetes-cluster/index.html
index 57228cc..a66502e 100644
--- a/docs/1.4/deployment/create-kubernetes-cluster/index.html
+++ b/docs/1.4/deployment/create-kubernetes-cluster/index.html
@@ -21,21 +21,21 @@
     <title>Setting up a Kubernetes Cluster :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/create-kubernetes-cluster/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/create-kubernetes-cluster/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/deployment/create-kubernetes-cluster/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/create-kubernetes-cluster/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/create-kubernetes-cluster/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/create-kubernetes-cluster/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/create-kubernetes-cluster/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/create-kubernetes-cluster/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/create-kubernetes-cluster/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/create-kubernetes-cluster/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/create-kubernetes-cluster/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/create-kubernetes-cluster/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/create-kubernetes-cluster/">dev</option>
@@ -3023,19 +3077,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/deployment/helm-based-deployment/index.html b/docs/1.4/deployment/helm-based-deployment/index.html
index 93a4696..ec3300b 100644
--- a/docs/1.4/deployment/helm-based-deployment/index.html
+++ b/docs/1.4/deployment/helm-based-deployment/index.html
@@ -21,21 +21,21 @@
     <title>Helm based Deployment :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/helm-based-deployment/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/helm-based-deployment/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/deployment/helm-based-deployment/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/helm-based-deployment/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/helm-based-deployment/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/helm-based-deployment/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/helm-based-deployment/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/helm-based-deployment/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/helm-based-deployment/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/helm-based-deployment/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/helm-based-deployment/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/helm-based-deployment/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/helm-based-deployment/">dev</option>
@@ -3070,19 +3124,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/deployment/index.html b/docs/1.4/deployment/index.html
index 174448d..4d21c31 100644
--- a/docs/1.4/deployment/index.html
+++ b/docs/1.4/deployment/index.html
@@ -21,21 +21,21 @@
     <title>Deployment :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
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+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
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@@ -83,14 +83,14 @@
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 </div>
 
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+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
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 </script>
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+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
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+              
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@@ -1486,6 +1520,8 @@
                   
               
                   
+              
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                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
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                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
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                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
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                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
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                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
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+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/">dev</option>
@@ -2896,19 +2950,19 @@
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-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
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-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
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     </script>
diff --git a/docs/1.4/deployment/openshift/index.html b/docs/1.4/deployment/openshift/index.html
index 285e764..2032bdf 100644
--- a/docs/1.4/deployment/openshift/index.html
+++ b/docs/1.4/deployment/openshift/index.html
@@ -21,21 +21,21 @@
     <title>OpenShift / OKD :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
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-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/openshift/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/openshift/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/deployment/openshift/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/openshift/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/openshift/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/openshift/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/openshift/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/openshift/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/openshift/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/openshift/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/openshift/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/openshift/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/openshift/">dev</option>
@@ -2917,19 +2971,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
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diff --git a/docs/1.4/deployment/resource-limitation/index.html b/docs/1.4/deployment/resource-limitation/index.html
index 47a6b3e..94f7e2f 100644
--- a/docs/1.4/deployment/resource-limitation/index.html
+++ b/docs/1.4/deployment/resource-limitation/index.html
@@ -21,21 +21,21 @@
     <title>Limiting Resource Usage :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
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-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
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-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/resource-limitation/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/resource-limitation/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/deployment/resource-limitation/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/resource-limitation/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/resource-limitation/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/resource-limitation/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/resource-limitation/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/resource-limitation/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/resource-limitation/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/resource-limitation/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/resource-limitation/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/resource-limitation/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/resource-limitation/">dev</option>
@@ -2980,19 +3034,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/dev-guide/amqp_adapter_client/index.html b/docs/1.4/dev-guide/amqp_adapter_client/index.html
index 61e6300..d70291a 100644
--- a/docs/1.4/dev-guide/amqp_adapter_client/index.html
+++ b/docs/1.4/dev-guide/amqp_adapter_client/index.html
@@ -21,21 +21,21 @@
     <title>AMQP Adapter Client for Java :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/amqp_adapter_client/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/amqp_adapter_client/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/dev-guide/amqp_adapter_client/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/amqp_adapter_client/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/amqp_adapter_client/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/amqp_adapter_client/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/amqp_adapter_client/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/amqp_adapter_client/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/amqp_adapter_client/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/amqp_adapter_client/">1.2</option>
@@ -1714,6 +1762,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/amqp_adapter_client/">dev</option>
@@ -2891,19 +2941,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/dev-guide/building_hono/index.html b/docs/1.4/dev-guide/building_hono/index.html
index c174537..07068ca 100644
--- a/docs/1.4/dev-guide/building_hono/index.html
+++ b/docs/1.4/dev-guide/building_hono/index.html
@@ -21,21 +21,21 @@
     <title>Building from Source :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/building_hono/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/building_hono/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/dev-guide/building_hono/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/building_hono/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/building_hono/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/building_hono/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/building_hono/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/building_hono/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/building_hono/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/building_hono/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/dev-guide/building_hono/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/dev-guide/building_hono/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/building_hono/">dev</option>
@@ -2958,19 +3012,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/dev-guide/custom_http_adapter/index.html b/docs/1.4/dev-guide/custom_http_adapter/index.html
index 98af065..c614e99 100644
--- a/docs/1.4/dev-guide/custom_http_adapter/index.html
+++ b/docs/1.4/dev-guide/custom_http_adapter/index.html
@@ -21,21 +21,21 @@
     <title>Implement a Custom Hono HTTP Protocol Adapter :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/custom_http_adapter/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/custom_http_adapter/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/dev-guide/custom_http_adapter/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/custom_http_adapter/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/custom_http_adapter/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/custom_http_adapter/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/custom_http_adapter/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/custom_http_adapter/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/custom_http_adapter/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/custom_http_adapter/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/dev-guide/custom_http_adapter/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/dev-guide/custom_http_adapter/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/custom_http_adapter/">dev</option>
@@ -2990,19 +3044,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/dev-guide/index.html b/docs/1.4/dev-guide/index.html
index 51d87b4..76c6795 100644
--- a/docs/1.4/dev-guide/index.html
+++ b/docs/1.4/dev-guide/index.html
@@ -21,21 +21,21 @@
     <title>Developer Guide :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225108" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225108"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225108"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225108"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225108"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/dev-guide/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/dev-guide/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/dev-guide/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/">dev</option>
@@ -2896,19 +2950,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/dev-guide/java_client_consumer/index.html b/docs/1.4/dev-guide/java_client_consumer/index.html
index 927daa7..d3de53b 100644
--- a/docs/1.4/dev-guide/java_client_consumer/index.html
+++ b/docs/1.4/dev-guide/java_client_consumer/index.html
@@ -21,21 +21,21 @@
     <title>Consuming Messages from Java :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/java_client_consumer/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/java_client_consumer/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/dev-guide/java_client_consumer/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/java_client_consumer/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/java_client_consumer/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/java_client_consumer/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/java_client_consumer/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/java_client_consumer/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/java_client_consumer/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/java_client_consumer/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/dev-guide/java_client_consumer/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/dev-guide/java_client_consumer/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/java_client_consumer/">dev</option>
@@ -2965,19 +3019,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/index.html b/docs/1.4/index.html
index 8b566aa..56615f4 100644
--- a/docs/1.4/index.html
+++ b/docs/1.4/index.html
@@ -21,21 +21,21 @@
     <title>Documentation :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/">dev</option>
@@ -2844,19 +2898,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/sitemap.xml b/docs/1.4/sitemap.xml
index 4c97278..a78e0ed 100644
--- a/docs/1.4/sitemap.xml
+++ b/docs/1.4/sitemap.xml
@@ -10,6 +10,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/"
                 />
@@ -67,6 +72,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/"
                 />
@@ -124,6 +134,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/device-identity/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/device-identity/"
                 />
@@ -181,6 +196,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/tenancy/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/tenancy/"
                 />
@@ -223,6 +243,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/device-provisioning/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/device-provisioning/"
                 />
@@ -275,6 +300,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/connecting-devices/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/connecting-devices/"
                 />
@@ -327,6 +357,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/device-notifications/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/device-notifications/"
                 />
@@ -369,6 +404,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/command-and-control/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/command-and-control/"
                 />
@@ -411,6 +451,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/resource-limits/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/resource-limits/"
                 />
@@ -468,6 +513,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/concepts/connection-events/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/concepts/connection-events/"
                 />
@@ -525,6 +575,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/"
                 />
@@ -582,6 +637,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/mongodb-based-device-registry/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/mongodb-based-device-registry/"
                 />
@@ -624,6 +684,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/file-based-device-registry/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/file-based-device-registry/"
                 />
@@ -666,6 +731,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/http-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/http-adapter/"
                 />
@@ -723,6 +793,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/mqtt-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/mqtt-adapter/"
                 />
@@ -780,6 +855,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/amqp-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/amqp-adapter/"
                 />
@@ -837,6 +917,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/coap-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/coap-adapter/"
                 />
@@ -884,6 +969,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/kura-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/kura-adapter/"
                 />
@@ -941,6 +1031,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/sigfox-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/sigfox-adapter/"
                 />
@@ -1025,6 +1120,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/"
                 />
@@ -1082,6 +1182,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/common-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/common-config/"
                 />
@@ -1139,6 +1244,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/auth-server-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/auth-server-config/"
                 />
@@ -1196,6 +1306,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/mongodb-device-registry-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/mongodb-device-registry-config/"
                 />
@@ -1238,6 +1353,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/file-based-device-registry-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/file-based-device-registry-config/"
                 />
@@ -1280,6 +1400,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/device-connection-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/device-connection-config/"
                 />
@@ -1337,6 +1462,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/http-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/http-adapter-config/"
                 />
@@ -1394,6 +1524,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/mqtt-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/mqtt-adapter-config/"
                 />
@@ -1451,6 +1586,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/amqp-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/amqp-adapter-config/"
                 />
@@ -1508,6 +1648,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/coap-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/coap-adapter-config/"
                 />
@@ -1550,6 +1695,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/kura-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/kura-adapter-config/"
                 />
@@ -1607,6 +1757,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/hono-client-configuration/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/hono-client-configuration/"
                 />
@@ -1664,6 +1819,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/amqp-network-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/amqp-network-config/"
                 />
@@ -1721,6 +1881,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/secure_communication/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/secure_communication/"
                 />
@@ -1778,6 +1943,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/monitoring-tracing-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/monitoring-tracing-config/"
                 />
@@ -1835,6 +2005,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/dev-guide/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/dev-guide/"
                 />
@@ -1892,6 +2067,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/dev-guide/building_hono/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/dev-guide/building_hono/"
                 />
@@ -1949,6 +2129,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/dev-guide/amqp_adapter_client/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/dev-guide/amqp_adapter_client/"
                 />
@@ -1996,6 +2181,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/dev-guide/java_client_consumer/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/dev-guide/java_client_consumer/"
                 />
@@ -2053,6 +2243,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/dev-guide/custom_http_adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/dev-guide/custom_http_adapter/"
                 />
@@ -2110,6 +2305,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/"
                 />
@@ -2167,6 +2367,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/telemetry/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/telemetry/"
                 />
@@ -2224,6 +2429,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/event/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/event/"
                 />
@@ -2281,6 +2491,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/command-and-control/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/command-and-control/"
                 />
@@ -2338,6 +2553,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/tenant/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/tenant/"
                 />
@@ -2395,6 +2615,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/device-connection/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/device-connection/"
                 />
@@ -2452,6 +2677,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/device-registration/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/device-registration/"
                 />
@@ -2509,6 +2739,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/credentials/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/credentials/"
                 />
@@ -2566,6 +2801,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/authentication/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/authentication/"
                 />
@@ -2623,6 +2863,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/management/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/management/"
                 />
@@ -2680,6 +2925,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/api/metrics/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/api/metrics/"
                 />
@@ -2737,6 +2987,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/deployment/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/deployment/"
                 />
@@ -2794,6 +3049,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/deployment/helm-based-deployment/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/deployment/helm-based-deployment/"
                 />
@@ -2851,6 +3111,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/deployment/openshift/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/deployment/openshift/"
                 />
@@ -2908,6 +3173,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/deployment/create-kubernetes-cluster/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/deployment/create-kubernetes-cluster/"
                 />
@@ -2965,6 +3235,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/deployment/resource-limitation/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/deployment/resource-limitation/"
                 />
@@ -3022,6 +3297,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/architecture/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/architecture/"
                 />
@@ -3079,6 +3359,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/architecture/component-view/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/architecture/component-view/"
                 />
@@ -3136,6 +3421,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/architecture/auth/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/architecture/auth/"
                 />
@@ -3193,6 +3483,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/categories/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/categories/"
                 />
@@ -3250,6 +3545,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/user-guide/device-registry/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/user-guide/device-registry/"
                 />
@@ -3307,6 +3607,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/admin-guide/device-registry-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/admin-guide/device-registry-config/"
                 />
@@ -3364,6 +3669,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.9"
+                href="https://www.eclipse.org/hono/docs/1.9/tags/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.8"
                 href="https://www.eclipse.org/hono/docs/1.8/tags/"
                 />
diff --git a/docs/1.4/tags/index.html b/docs/1.4/tags/index.html
index 9e102f6..018cb86 100644
--- a/docs/1.4/tags/index.html
+++ b/docs/1.4/tags/index.html
@@ -21,21 +21,21 @@
     <title>Tags :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225108" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138728"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225108"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138728"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138728"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225108"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225108"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138728"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225108"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/tags/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/tags/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/tags/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/tags/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/tags/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/tags/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/tags/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/tags/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/tags/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/tags/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/tags/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/tags/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/tags/">dev</option>
@@ -2893,19 +2947,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/amqp-adapter/index.html b/docs/1.4/user-guide/amqp-adapter/index.html
index ca5937c..9a1c7b2 100644
--- a/docs/1.4/user-guide/amqp-adapter/index.html
+++ b/docs/1.4/user-guide/amqp-adapter/index.html
@@ -21,21 +21,21 @@
     <title>AMQP Adapter :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/amqp-adapter/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/amqp-adapter/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/amqp-adapter/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/amqp-adapter/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/amqp-adapter/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/amqp-adapter/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/amqp-adapter/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/amqp-adapter/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/amqp-adapter/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/amqp-adapter/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/amqp-adapter/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/amqp-adapter/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/amqp-adapter/">dev</option>
@@ -3412,19 +3466,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/coap-adapter/index.html b/docs/1.4/user-guide/coap-adapter/index.html
index f9abce7..5a114f6 100644
--- a/docs/1.4/user-guide/coap-adapter/index.html
+++ b/docs/1.4/user-guide/coap-adapter/index.html
@@ -21,21 +21,21 @@
     <title>CoAP Adapter :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/coap-adapter/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/coap-adapter/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/coap-adapter/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/coap-adapter/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/coap-adapter/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/coap-adapter/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/coap-adapter/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/coap-adapter/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/coap-adapter/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/coap-adapter/">1.2</option>
@@ -1714,6 +1762,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/coap-adapter/">dev</option>
@@ -3650,19 +3700,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/device-registry/index.html b/docs/1.4/user-guide/device-registry/index.html
index 7d65084..a413eee 100644
--- a/docs/1.4/user-guide/device-registry/index.html
+++ b/docs/1.4/user-guide/device-registry/index.html
@@ -21,21 +21,21 @@
     <title>Device Registries :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/device-registry/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/device-registry/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/device-registry/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/device-registry/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/device-registry/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/device-registry/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/device-registry/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/device-registry/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/device-registry/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/device-registry/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/device-registry/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/device-registry/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/device-registry/">dev</option>
@@ -2909,19 +2963,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225107"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225107"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225107"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225107"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225107"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225107"></script>
+    <script src="/hono/docs/js/learn.js?1626225107"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225107"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225107" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225107"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/file-based-device-registry/index.html b/docs/1.4/user-guide/file-based-device-registry/index.html
index a8bf686..f6200a0 100644
--- a/docs/1.4/user-guide/file-based-device-registry/index.html
+++ b/docs/1.4/user-guide/file-based-device-registry/index.html
@@ -21,21 +21,21 @@
     <title>File Based Device Registry :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/file-based-device-registry/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/file-based-device-registry/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/file-based-device-registry/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/file-based-device-registry/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/file-based-device-registry/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/file-based-device-registry/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/file-based-device-registry/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/file-based-device-registry/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/file-based-device-registry/">1.3</option>
@@ -1684,6 +1730,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/file-based-device-registry/">dev</option>
@@ -2840,19 +2888,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/http-adapter/index.html b/docs/1.4/user-guide/http-adapter/index.html
index 783ed53..1d60131 100644
--- a/docs/1.4/user-guide/http-adapter/index.html
+++ b/docs/1.4/user-guide/http-adapter/index.html
@@ -21,21 +21,21 @@
     <title>HTTP Adapter :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/http-adapter/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/http-adapter/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/http-adapter/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/http-adapter/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/http-adapter/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/http-adapter/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/http-adapter/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/http-adapter/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/http-adapter/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/http-adapter/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/http-adapter/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/http-adapter/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/http-adapter/">dev</option>
@@ -3587,19 +3641,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/index.html b/docs/1.4/user-guide/index.html
index f783adc..9332744 100644
--- a/docs/1.4/user-guide/index.html
+++ b/docs/1.4/user-guide/index.html
@@ -21,21 +21,21 @@
     <title>User Guide :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138728" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225108" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225108" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138728" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225108" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138728"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225108"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138728"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138728"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225108"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225108"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138728"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225108"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/">dev</option>
@@ -2896,19 +2950,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/jmeter_load_tests/index.html b/docs/1.4/user-guide/jmeter_load_tests/index.html
index cedf7e3..14e670a 100644
--- a/docs/1.4/user-guide/jmeter_load_tests/index.html
+++ b/docs/1.4/user-guide/jmeter_load_tests/index.html
@@ -21,21 +21,21 @@
     <title>Load Tests with JMeter :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1464,6 +1464,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/jmeter_load_tests/" selected>1.4</option>
@@ -1496,6 +1498,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/jmeter_load_tests/">1.3</option>
@@ -1528,6 +1532,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/jmeter_load_tests/">1.2</option>
@@ -1560,6 +1566,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/jmeter_load_tests/">1.1</option>
@@ -1592,6 +1600,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/jmeter_load_tests/">1.0</option>
@@ -2757,19 +2767,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138727"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138727"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138727"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138727"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138727"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138727"></script>
-    <script src="/hono/docs/js/learn.js?1626138727"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138727"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138727" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138727"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/kura-adapter/index.html b/docs/1.4/user-guide/kura-adapter/index.html
index 16394a9..6ab8faa 100644
--- a/docs/1.4/user-guide/kura-adapter/index.html
+++ b/docs/1.4/user-guide/kura-adapter/index.html
@@ -21,21 +21,21 @@
     <title>Kura Adapter :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/kura-adapter/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/kura-adapter/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/kura-adapter/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/kura-adapter/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/kura-adapter/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/kura-adapter/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/kura-adapter/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/kura-adapter/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/kura-adapter/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/kura-adapter/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/kura-adapter/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/kura-adapter/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/kura-adapter/">dev</option>
@@ -3071,19 +3125,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/mongodb-based-device-registry/index.html b/docs/1.4/user-guide/mongodb-based-device-registry/index.html
index d6cd6ca..b53ae24 100644
--- a/docs/1.4/user-guide/mongodb-based-device-registry/index.html
+++ b/docs/1.4/user-guide/mongodb-based-device-registry/index.html
@@ -21,21 +21,21 @@
     <title>MongoDB Based Device Registry :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/mongodb-based-device-registry/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/mongodb-based-device-registry/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/mongodb-based-device-registry/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/mongodb-based-device-registry/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/mongodb-based-device-registry/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/mongodb-based-device-registry/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/mongodb-based-device-registry/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/mongodb-based-device-registry/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/mongodb-based-device-registry/">1.3</option>
@@ -1684,6 +1730,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/mongodb-based-device-registry/">dev</option>
@@ -2834,19 +2882,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/mqtt-adapter/index.html b/docs/1.4/user-guide/mqtt-adapter/index.html
index 5be82c2..74cd85b 100644
--- a/docs/1.4/user-guide/mqtt-adapter/index.html
+++ b/docs/1.4/user-guide/mqtt-adapter/index.html
@@ -21,21 +21,21 @@
     <title>MQTT Adapter :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/mqtt-adapter/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/mqtt-adapter/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/mqtt-adapter/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/mqtt-adapter/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/mqtt-adapter/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/mqtt-adapter/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/mqtt-adapter/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/mqtt-adapter/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/mqtt-adapter/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/mqtt-adapter/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/mqtt-adapter/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/mqtt-adapter/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/mqtt-adapter/">dev</option>
@@ -3341,19 +3395,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/user-guide/sigfox-adapter/index.html b/docs/1.4/user-guide/sigfox-adapter/index.html
index 0f1df3e..6182655 100644
--- a/docs/1.4/user-guide/sigfox-adapter/index.html
+++ b/docs/1.4/user-guide/sigfox-adapter/index.html
@@ -21,21 +21,21 @@
     <title>Sigfox Adapter :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1626138727" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225107" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1626225107" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1626138727" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1626225107" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626138727"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1626225107"></script>
 
     <style>
       :root #header + #content > #left > #rlblock_left{
@@ -83,14 +83,14 @@
     <span data-search-clear=""><i class="fas fa-times"></i></span>
 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626138727"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1626225107"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1626225107"></script>
 <script type="text/javascript">
     
         var baseurl = "https:\/\/www.eclipse.org\/hono\/docs\/\/1.4";
     
 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1626138727"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1626225107"></script>
 
     
   </div>
@@ -1456,7 +1456,41 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/sigfox-adapter/">stable (1.8)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/sigfox-adapter/">stable (1.9)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.9" value="https://www.eclipse.org/hono/docs/1.9/user-guide/sigfox-adapter/">1.9</option>
                     
                   
               
@@ -1486,6 +1520,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/sigfox-adapter/">1.8</option>
@@ -1518,6 +1554,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/sigfox-adapter/">1.7</option>
@@ -1550,6 +1588,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/sigfox-adapter/">1.6</option>
@@ -1582,6 +1622,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/sigfox-adapter/">1.5</option>
@@ -1614,6 +1656,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/sigfox-adapter/" selected>1.4</option>
@@ -1646,6 +1690,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/sigfox-adapter/">1.3</option>
@@ -1678,6 +1724,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/sigfox-adapter/">1.2</option>
@@ -1710,6 +1758,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/sigfox-adapter/">1.1</option>
@@ -1742,6 +1792,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/sigfox-adapter/">1.0</option>
@@ -1774,6 +1826,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/sigfox-adapter/">dev</option>
@@ -3021,19 +3075,19 @@
     <div style="left: -1000px; overflow: scroll; position: absolute; top: -1000px; border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;">
       <div style="border: none; box-sizing: content-box; height: 200px; margin: 0px; padding: 0px; width: 200px;"></div>
     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626138728"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626138728"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1626138728"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1626138728"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1626138728"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1626225108"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1626225108"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1626225108"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1626225108"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1626225108"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626138728"></script>
-    <script src="/hono/docs/js/learn.js?1626138728"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1626138728"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1626225108"></script>
+    <script src="/hono/docs/js/learn.js?1626225108"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1626225108"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1626138728" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1626138728"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1626225108" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1626225108"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>