Website build Hono-Website-Declarative-Pipeline-242

Signed-off-by: Hono Bot <hono-bot@eclipse.org>
diff --git a/docs/1.4/404.html b/docs/1.4/404.html
index 0645ac2..860d902 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?1621559520" rel="stylesheet">
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-      <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+      <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
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index 0eba75f..106921b 100644
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     <title>AMQP Adapter Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
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+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
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-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
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+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
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@@ -1456,7 +1456,39 @@
                   
                     
                     
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-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
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     <script>
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index d55e970..01a9abc 100644
--- a/docs/1.4/admin-guide/amqp-network-config/index.html
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@@ -21,21 +21,21 @@
     <title>AMQP 1.0 Messaging Network Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
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-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
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+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
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+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
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+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></script>
 
     <style>
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 </div>
 
-<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></script>
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/amqp-network-config/">stable (1.7)</option>
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@@ -1484,6 +1516,8 @@
                   
               
                   
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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>
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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="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/amqp-network-config/">1.3</option>
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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>
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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/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
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+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
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-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
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+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 59b55fd..bc0d3ca 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 @@
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-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
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+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
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+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></script>
 <script type="text/javascript">
     
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
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@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/auth-server-config/">stable (1.7)</option>
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+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/auth-server-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/auth-server-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/auth-server-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/auth-server-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/auth-server-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/auth-server-config/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/auth-server-config/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/auth-server-config/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/auth-server-config/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/auth-server-config/">dev</option>
@@ -3042,19 +3092,19 @@
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       <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 bcd23bc..cfa8968 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/coap-adapter-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/coap-adapter-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/coap-adapter-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/coap-adapter-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/coap-adapter-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/coap-adapter-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/coap-adapter-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/coap-adapter-config/">1.3</option>
@@ -1640,6 +1682,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/coap-adapter-config/">dev</option>
@@ -3015,19 +3059,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 0fd9ee8..d5c9c2c 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/common-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/common-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/common-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/common-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/common-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/common-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/common-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/common-config/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/common-config/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/common-config/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/common-config/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/common-config/">dev</option>
@@ -3122,19 +3172,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
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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 636268d..3c37318 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 @@
     <title>Configuring the Device Connection Service :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/device-connection-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/device-connection-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/device-connection-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/device-connection-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/device-connection-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/device-connection-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/device-connection-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/device-connection-config/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/device-connection-config/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/device-connection-config/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/device-connection-config/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/device-connection-config/">dev</option>
@@ -3145,19 +3195,19 @@
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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/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
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 69e45f9..dc05c4e 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/device-registry-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/device-registry-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/device-registry-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/device-registry-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/device-registry-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/device-registry-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/device-registry-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/device-registry-config/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/device-registry-config/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/device-registry-config/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/device-registry-config/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/device-registry-config/">dev</option>
@@ -2860,19 +2910,19 @@
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       <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></script>
     <script>
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     </script>
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 6b5c79e..a3945ad 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/file-based-device-registry-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/file-based-device-registry-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/file-based-device-registry-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/file-based-device-registry-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/file-based-device-registry-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/file-based-device-registry-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/file-based-device-registry-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/file-based-device-registry-config/">1.3</option>
@@ -1640,6 +1682,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/file-based-device-registry-config/">dev</option>
@@ -3277,19 +3321,19 @@
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
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-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
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+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 1ab78d1..a491e91 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/hono-client-configuration/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/hono-client-configuration/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/hono-client-configuration/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/hono-client-configuration/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/hono-client-configuration/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/hono-client-configuration/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/hono-client-configuration/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/hono-client-configuration/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/hono-client-configuration/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/hono-client-configuration/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/hono-client-configuration/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/hono-client-configuration/">dev</option>
@@ -3126,19 +3176,19 @@
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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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 a534310..9b18843 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/http-adapter-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/http-adapter-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
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+              
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+              
+                  
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+              
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+              
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+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/http-adapter-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/http-adapter-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/http-adapter-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/http-adapter-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/http-adapter-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/http-adapter-config/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/http-adapter-config/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/http-adapter-config/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/http-adapter-config/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/http-adapter-config/">dev</option>
@@ -3034,19 +3084,19 @@
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       <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
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     </script>
diff --git a/docs/1.4/admin-guide/index.html b/docs/1.4/admin-guide/index.html
index 9523290..d19b7d6 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
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                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
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+                  
                     
                     
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@@ -1724,6 +1772,8 @@
                   
               
                   
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@@ -2846,19 +2896,19 @@
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-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
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-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
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diff --git a/docs/1.4/admin-guide/kura-adapter-config/index.html b/docs/1.4/admin-guide/kura-adapter-config/index.html
index df12219..1e193b7 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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-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
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-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></script>
 
     <style>
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@@ -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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></script>
 <script type="text/javascript">
     
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/kura-adapter-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/kura-adapter-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/kura-adapter-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/kura-adapter-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/kura-adapter-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/kura-adapter-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/kura-adapter-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/kura-adapter-config/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/kura-adapter-config/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/kura-adapter-config/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/kura-adapter-config/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/kura-adapter-config/">dev</option>
@@ -3059,19 +3109,19 @@
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     </div>
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
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 cff3d00..0ab1cb5 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 @@
     <title>MongoDB Based Device Registry Configuration :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/mongodb-device-registry-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/mongodb-device-registry-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/mongodb-device-registry-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/mongodb-device-registry-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/mongodb-device-registry-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/mongodb-device-registry-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/mongodb-device-registry-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/mongodb-device-registry-config/">1.3</option>
@@ -1640,6 +1682,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/mongodb-device-registry-config/">dev</option>
@@ -3093,19 +3137,19 @@
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     </div>
-    <script src="/hono/docs/js/clipboard.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
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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 b43df6f..db88ac7 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 @@
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-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/monitoring-tracing-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/monitoring-tracing-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/monitoring-tracing-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/monitoring-tracing-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/monitoring-tracing-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/monitoring-tracing-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/monitoring-tracing-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/monitoring-tracing-config/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/monitoring-tracing-config/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/monitoring-tracing-config/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/monitoring-tracing-config/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/monitoring-tracing-config/">dev</option>
@@ -3022,19 +3072,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </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 3033928..88dadb5 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/mqtt-adapter-config/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/mqtt-adapter-config/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/mqtt-adapter-config/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/mqtt-adapter-config/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/mqtt-adapter-config/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/mqtt-adapter-config/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/mqtt-adapter-config/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/mqtt-adapter-config/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/mqtt-adapter-config/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/mqtt-adapter-config/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/mqtt-adapter-config/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/mqtt-adapter-config/">dev</option>
@@ -3086,19 +3136,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 6f2c6de..a6d2a5d 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/secure_communication/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/admin-guide/secure_communication/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/admin-guide/secure_communication/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/admin-guide/secure_communication/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/admin-guide/secure_communication/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/admin-guide/secure_communication/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/admin-guide/secure_communication/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/admin-guide/secure_communication/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/admin-guide/secure_communication/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/admin-guide/secure_communication/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/admin-guide/secure_communication/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/admin-guide/secure_communication/">dev</option>
@@ -3157,19 +3207,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 9e799b7..35eaf28 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/authentication/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/authentication/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/authentication/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/authentication/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/authentication/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/authentication/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/authentication/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/authentication/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/authentication/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/authentication/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/authentication/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/authentication/">dev</option>
@@ -2987,19 +3037,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 f053e01..1213c75 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/command-and-control/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/command-and-control/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/command-and-control/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/command-and-control/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/command-and-control/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/command-and-control/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/command-and-control/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/command-and-control/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/command-and-control/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/command-and-control/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/command-and-control/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/command-and-control/">dev</option>
@@ -3171,19 +3221,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 5cc3589..7103ad6 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/credentials/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/credentials/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/credentials/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/credentials/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/credentials/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/credentials/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/credentials/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/credentials/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/credentials/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/credentials/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/credentials/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/credentials/">dev</option>
@@ -3401,19 +3451,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 f1da01e..40ab217 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/device-connection/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/device-connection/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/device-connection/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/device-connection/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/device-connection/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/device-connection/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/device-connection/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/device-connection/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/device-connection/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/device-connection/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/device-connection/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/device-connection/">dev</option>
@@ -3494,19 +3544,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 f6631e2..c08b093 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/device-registration/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/device-registration/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/device-registration/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/device-registration/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/device-registration/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/device-registration/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/device-registration/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/device-registration/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/device-registration/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/device-registration/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/device-registration/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/device-registration/">dev</option>
@@ -3087,19 +3137,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 84ef65d..aad0619 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/event/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/event/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/event/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/event/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/event/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/event/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/event/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/event/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/event/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/event/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/event/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/event/">dev</option>
@@ -3053,19 +3103,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/api/index.html b/docs/1.4/api/index.html
index a76b724..240b27c 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/">dev</option>
@@ -2847,19 +2897,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 81bdb59..67c4c6b 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1459,7 +1459,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/management/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/management/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/management/">1.8</option>
                     
                   
               
@@ -1487,6 +1519,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/management/">1.7</option>
@@ -1517,6 +1551,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/management/">1.6</option>
@@ -1547,6 +1583,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/management/">1.5</option>
@@ -1577,6 +1615,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/management/" selected>1.4</option>
@@ -1607,6 +1647,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/management/">1.3</option>
@@ -1637,6 +1679,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/management/">1.2</option>
@@ -1667,6 +1711,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/management/">1.1</option>
@@ -1697,6 +1743,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/management/">1.0</option>
@@ -1727,6 +1775,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/management/">dev</option>
@@ -2908,19 +2958,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 1777684..47fb228 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/metrics/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/metrics/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/metrics/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/metrics/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/metrics/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/metrics/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/metrics/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/metrics/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/metrics/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/metrics/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/metrics/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/metrics/">dev</option>
@@ -3129,19 +3179,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 a852da3..a1b3c42 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/telemetry/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/telemetry/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/telemetry/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/telemetry/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/telemetry/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/telemetry/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/telemetry/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/telemetry/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/telemetry/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/telemetry/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/telemetry/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/telemetry/">dev</option>
@@ -3024,19 +3074,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 cdef601..67d45fc 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/tenant/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/api/tenant/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/api/tenant/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/api/tenant/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/api/tenant/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/api/tenant/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/api/tenant/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/api/tenant/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/api/tenant/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/api/tenant/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/api/tenant/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/api/tenant/">dev</option>
@@ -3474,19 +3524,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 408d7b8..3c4a7f9 100644
--- a/docs/1.4/architecture/auth/index.html
+++ b/docs/1.4/architecture/auth/index.html
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+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
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+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></script>
 
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 </div>
 
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-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
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 <script type="text/javascript">
     
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 </script>
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   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/auth/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/auth/">stable (1.8)</option>
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+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/architecture/auth/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
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                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/architecture/auth/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
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                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/architecture/auth/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
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                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/architecture/auth/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
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                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/architecture/auth/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
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                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/architecture/auth/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
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                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/architecture/auth/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
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                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/architecture/auth/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
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                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/architecture/auth/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/architecture/auth/">dev</option>
@@ -2902,19 +2952,19 @@
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
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-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
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+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
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+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
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-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
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+    <script src="/hono/docs/js/learn.js?1621559519"></script>
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-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
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     <script>
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diff --git a/docs/1.4/architecture/component-view/index.html b/docs/1.4/architecture/component-view/index.html
index e8bc083..1320be6 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
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+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
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+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></script>
 <script type="text/javascript">
     
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 </script>
-<script type="text/javascript" src="/hono/docs/js/search.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/component-view/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/component-view/">stable (1.8)</option>
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+                  
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+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/architecture/component-view/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/architecture/component-view/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/architecture/component-view/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/architecture/component-view/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/architecture/component-view/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/architecture/component-view/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/architecture/component-view/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/architecture/component-view/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/architecture/component-view/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/architecture/component-view/">dev</option>
@@ -2905,19 +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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
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index 1f0856e..f7df2eb 100644
--- a/docs/1.4/architecture/index.html
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@@ -21,21 +21,21 @@
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-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
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+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
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-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/architecture/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/architecture/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/architecture/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/architecture/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/architecture/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/architecture/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/architecture/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/architecture/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/architecture/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/architecture/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/architecture/">dev</option>
@@ -2846,19 +2896,19 @@
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
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-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
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-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
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diff --git a/docs/1.4/categories/index.html b/docs/1.4/categories/index.html
index b7801c9..02dce0a 100644
--- a/docs/1.4/categories/index.html
+++ b/docs/1.4/categories/index.html
@@ -21,21 +21,21 @@
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-    <link href="/hono/docs/css/nucleus.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
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-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/categories/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/categories/">stable (1.8)</option>
+                    
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+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/categories/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/categories/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/categories/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/categories/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/categories/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/categories/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/categories/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/categories/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/categories/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/categories/">dev</option>
@@ -2843,19 +2893,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/command-and-control/index.html b/docs/1.4/concepts/command-and-control/index.html
index 12ea703..01433cb 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 @@
     <title>Command & Control :: Eclipse Hono&trade; Vers.: 1.4</title>
 
     
-    <link href="/hono/docs/css/nucleus.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/command-and-control/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/command-and-control/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/command-and-control/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/command-and-control/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/command-and-control/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/command-and-control/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/command-and-control/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/command-and-control/">1.3</option>
@@ -1640,6 +1682,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/command-and-control/">dev</option>
@@ -2894,19 +2938,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
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diff --git a/docs/1.4/concepts/connecting-devices/index.html b/docs/1.4/concepts/connecting-devices/index.html
index 86ddea5..dbc911a 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/connecting-devices/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/connecting-devices/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/connecting-devices/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/connecting-devices/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/connecting-devices/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/connecting-devices/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/connecting-devices/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/connecting-devices/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/connecting-devices/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/connecting-devices/">1.1</option>
@@ -1696,6 +1742,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/connecting-devices/">dev</option>
@@ -2961,19 +3009,19 @@
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       <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 ce341a1..10b92a3 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/connection-events/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/connection-events/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/connection-events/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/connection-events/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/connection-events/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/connection-events/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/connection-events/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/connection-events/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/connection-events/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/connection-events/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/concepts/connection-events/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/connection-events/">dev</option>
@@ -2881,19 +2931,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/concepts/device-identity/index.html b/docs/1.4/concepts/device-identity/index.html
index f5846c8..7e5ef35 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-identity/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-identity/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/device-identity/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/device-identity/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/device-identity/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/device-identity/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/device-identity/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/device-identity/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/device-identity/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/device-identity/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/concepts/device-identity/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/device-identity/">dev</option>
@@ -2885,19 +2935,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559519"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559519"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559519"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559519"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559519"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559519"></script>
+    <script src="/hono/docs/js/learn.js?1621559519"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559519"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559519" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559519"></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 d400e6d..7e66576 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-notifications/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-notifications/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/device-notifications/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/device-notifications/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/device-notifications/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/device-notifications/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/device-notifications/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/device-notifications/">1.3</option>
@@ -1640,6 +1682,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/device-notifications/">dev</option>
@@ -2863,19 +2907,19 @@
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       <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 be8c0d3..86d91a8 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-provisioning/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/device-provisioning/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/device-provisioning/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/device-provisioning/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/device-provisioning/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/device-provisioning/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/device-provisioning/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/device-provisioning/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/device-provisioning/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/device-provisioning/">1.1</option>
@@ -1696,6 +1742,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/device-provisioning/">dev</option>
@@ -2898,19 +2946,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
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diff --git a/docs/1.4/concepts/index.html b/docs/1.4/concepts/index.html
index 09d6601..4e1427f 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?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/concepts/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/">dev</option>
@@ -2843,19 +2893,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
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diff --git a/docs/1.4/concepts/resource-limits/index.html b/docs/1.4/concepts/resource-limits/index.html
index ce0a99a..9b2dced 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
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-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/resource-limits/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/resource-limits/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/resource-limits/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/resource-limits/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/resource-limits/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/resource-limits/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/resource-limits/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/resource-limits/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/concepts/resource-limits/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/concepts/resource-limits/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/concepts/resource-limits/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/resource-limits/">dev</option>
@@ -2919,19 +2969,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 c8a6220..48d2bfe 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/tenancy/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/concepts/tenancy/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/concepts/tenancy/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/concepts/tenancy/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/concepts/tenancy/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/concepts/tenancy/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/concepts/tenancy/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/concepts/tenancy/">1.3</option>
@@ -1640,6 +1682,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/concepts/tenancy/">dev</option>
@@ -2884,19 +2928,19 @@
     <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?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473404"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473404"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473404"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473404"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473404"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473404"></script>
-    <script src="/hono/docs/js/learn.js?1621473404"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473404"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473404" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473404"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 1804131..1e78d7b 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/create-kubernetes-cluster/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/create-kubernetes-cluster/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/create-kubernetes-cluster/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/create-kubernetes-cluster/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/create-kubernetes-cluster/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/create-kubernetes-cluster/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/create-kubernetes-cluster/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/create-kubernetes-cluster/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/create-kubernetes-cluster/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/create-kubernetes-cluster/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/create-kubernetes-cluster/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/create-kubernetes-cluster/">dev</option>
@@ -2973,19 +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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 12f62f8..cdd60e1 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/helm-based-deployment/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/helm-based-deployment/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/helm-based-deployment/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/helm-based-deployment/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/helm-based-deployment/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/helm-based-deployment/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/helm-based-deployment/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/helm-based-deployment/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/helm-based-deployment/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/helm-based-deployment/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/helm-based-deployment/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/helm-based-deployment/">dev</option>
@@ -3020,19 +3070,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/deployment/index.html b/docs/1.4/deployment/index.html
index 48748f6..2964bed 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?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/">dev</option>
@@ -2846,19 +2896,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/deployment/openshift/index.html b/docs/1.4/deployment/openshift/index.html
index 1dea347..cd26547 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/openshift/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/openshift/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/openshift/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/openshift/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/openshift/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/openshift/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/openshift/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/openshift/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/openshift/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/openshift/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/openshift/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/openshift/">dev</option>
@@ -2867,19 +2917,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/deployment/resource-limitation/index.html b/docs/1.4/deployment/resource-limitation/index.html
index 0da438b..59601b1 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/resource-limitation/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/deployment/resource-limitation/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/deployment/resource-limitation/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/deployment/resource-limitation/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/deployment/resource-limitation/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/deployment/resource-limitation/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/deployment/resource-limitation/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/deployment/resource-limitation/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/deployment/resource-limitation/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/deployment/resource-limitation/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/deployment/resource-limitation/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/deployment/resource-limitation/">dev</option>
@@ -2930,19 +2980,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 39f7abc..7298166 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/amqp_adapter_client/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/amqp_adapter_client/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/amqp_adapter_client/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/amqp_adapter_client/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/amqp_adapter_client/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/amqp_adapter_client/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/amqp_adapter_client/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/amqp_adapter_client/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/amqp_adapter_client/">1.2</option>
@@ -1668,6 +1712,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/amqp_adapter_client/">dev</option>
@@ -2845,19 +2891,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 322e302..7c33076 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/building_hono/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/building_hono/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/building_hono/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/building_hono/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/building_hono/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/building_hono/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/building_hono/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/building_hono/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/building_hono/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/dev-guide/building_hono/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/dev-guide/building_hono/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/building_hono/">dev</option>
@@ -2908,19 +2958,19 @@
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       <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 64feb06..39a2e93 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/custom_http_adapter/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/custom_http_adapter/">stable (1.8)</option>
+                    
+                  
+              
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+              
+                  
+              
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+              
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+              
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+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/custom_http_adapter/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/custom_http_adapter/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/custom_http_adapter/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/custom_http_adapter/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/custom_http_adapter/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/custom_http_adapter/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/custom_http_adapter/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/dev-guide/custom_http_adapter/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/dev-guide/custom_http_adapter/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/custom_http_adapter/">dev</option>
@@ -2940,19 +2990,19 @@
     <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>
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-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 dfde328..b387302 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?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/dev-guide/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/dev-guide/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/">dev</option>
@@ -2846,19 +2896,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
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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 5167135..55fcbbd 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/java_client_consumer/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/java_client_consumer/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/dev-guide/java_client_consumer/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/java_client_consumer/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/java_client_consumer/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/java_client_consumer/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/java_client_consumer/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/java_client_consumer/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/dev-guide/java_client_consumer/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/dev-guide/java_client_consumer/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/dev-guide/java_client_consumer/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/dev-guide/java_client_consumer/">dev</option>
@@ -2915,19 +2965,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/index.html b/docs/1.4/index.html
index 9fdce5f..3748f62 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?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/">dev</option>
@@ -2794,19 +2844,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></script>
     <script>
         mermaid.initialize({ startOnLoad: true });
     </script>
diff --git a/docs/1.4/sitemap.xml b/docs/1.4/sitemap.xml
index bb17abd..4c97278 100644
--- a/docs/1.4/sitemap.xml
+++ b/docs/1.4/sitemap.xml
@@ -10,6 +10,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/"
                 />
@@ -62,6 +67,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/"
                 />
@@ -114,6 +124,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/device-identity/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/device-identity/"
                 />
@@ -166,6 +181,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/tenancy/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/tenancy/"
                 />
@@ -203,6 +223,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/device-provisioning/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/device-provisioning/"
                 />
@@ -250,6 +275,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/connecting-devices/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/connecting-devices/"
                 />
@@ -297,6 +327,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/device-notifications/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/device-notifications/"
                 />
@@ -334,6 +369,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/command-and-control/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/command-and-control/"
                 />
@@ -371,6 +411,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/resource-limits/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/resource-limits/"
                 />
@@ -423,6 +468,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/concepts/connection-events/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/concepts/connection-events/"
                 />
@@ -475,6 +525,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/"
                 />
@@ -527,6 +582,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/mongodb-based-device-registry/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/mongodb-based-device-registry/"
                 />
@@ -564,6 +624,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/file-based-device-registry/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/file-based-device-registry/"
                 />
@@ -601,6 +666,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/http-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/http-adapter/"
                 />
@@ -653,6 +723,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/mqtt-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/mqtt-adapter/"
                 />
@@ -705,6 +780,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/amqp-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/amqp-adapter/"
                 />
@@ -757,6 +837,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/coap-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/coap-adapter/"
                 />
@@ -799,6 +884,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/kura-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/kura-adapter/"
                 />
@@ -851,6 +941,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/sigfox-adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/sigfox-adapter/"
                 />
@@ -930,6 +1025,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/"
                 />
@@ -982,6 +1082,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/common-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/common-config/"
                 />
@@ -1034,6 +1139,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/auth-server-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/auth-server-config/"
                 />
@@ -1086,6 +1196,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/mongodb-device-registry-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/mongodb-device-registry-config/"
                 />
@@ -1123,6 +1238,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/file-based-device-registry-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/file-based-device-registry-config/"
                 />
@@ -1160,6 +1280,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/device-connection-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/device-connection-config/"
                 />
@@ -1212,6 +1337,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/http-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/http-adapter-config/"
                 />
@@ -1264,6 +1394,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/mqtt-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/mqtt-adapter-config/"
                 />
@@ -1316,6 +1451,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/amqp-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/amqp-adapter-config/"
                 />
@@ -1368,6 +1508,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/coap-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/coap-adapter-config/"
                 />
@@ -1405,6 +1550,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/kura-adapter-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/kura-adapter-config/"
                 />
@@ -1457,6 +1607,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/hono-client-configuration/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/hono-client-configuration/"
                 />
@@ -1509,6 +1664,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/amqp-network-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/amqp-network-config/"
                 />
@@ -1561,6 +1721,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/secure_communication/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/secure_communication/"
                 />
@@ -1613,6 +1778,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/monitoring-tracing-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/monitoring-tracing-config/"
                 />
@@ -1665,6 +1835,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/dev-guide/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/dev-guide/"
                 />
@@ -1717,6 +1892,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/dev-guide/building_hono/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/dev-guide/building_hono/"
                 />
@@ -1769,6 +1949,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/dev-guide/amqp_adapter_client/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/dev-guide/amqp_adapter_client/"
                 />
@@ -1811,6 +1996,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/dev-guide/java_client_consumer/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/dev-guide/java_client_consumer/"
                 />
@@ -1863,6 +2053,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/dev-guide/custom_http_adapter/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/dev-guide/custom_http_adapter/"
                 />
@@ -1915,6 +2110,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/"
                 />
@@ -1967,6 +2167,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/telemetry/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/telemetry/"
                 />
@@ -2019,6 +2224,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/event/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/event/"
                 />
@@ -2071,6 +2281,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/command-and-control/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/command-and-control/"
                 />
@@ -2123,6 +2338,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/tenant/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/tenant/"
                 />
@@ -2175,6 +2395,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/device-connection/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/device-connection/"
                 />
@@ -2227,6 +2452,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/device-registration/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/device-registration/"
                 />
@@ -2279,6 +2509,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/credentials/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/credentials/"
                 />
@@ -2331,6 +2566,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/authentication/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/authentication/"
                 />
@@ -2383,6 +2623,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/management/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/management/"
                 />
@@ -2435,6 +2680,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/api/metrics/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/api/metrics/"
                 />
@@ -2487,6 +2737,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/deployment/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/deployment/"
                 />
@@ -2539,6 +2794,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/deployment/helm-based-deployment/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/deployment/helm-based-deployment/"
                 />
@@ -2591,6 +2851,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/deployment/openshift/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/deployment/openshift/"
                 />
@@ -2643,6 +2908,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/deployment/create-kubernetes-cluster/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/deployment/create-kubernetes-cluster/"
                 />
@@ -2695,6 +2965,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/deployment/resource-limitation/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/deployment/resource-limitation/"
                 />
@@ -2747,6 +3022,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/architecture/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/architecture/"
                 />
@@ -2799,6 +3079,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/architecture/component-view/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/architecture/component-view/"
                 />
@@ -2851,6 +3136,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/architecture/auth/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/architecture/auth/"
                 />
@@ -2903,6 +3193,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/categories/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/categories/"
                 />
@@ -2955,6 +3250,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/user-guide/device-registry/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/user-guide/device-registry/"
                 />
@@ -3007,6 +3307,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/admin-guide/device-registry-config/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/admin-guide/device-registry-config/"
                 />
@@ -3059,6 +3364,11 @@
                 />
     <xhtml:link
                 rel="alternate"
+                hreflang="1.8"
+                href="https://www.eclipse.org/hono/docs/1.8/tags/"
+                />
+    <xhtml:link
+                rel="alternate"
                 hreflang="1.7"
                 href="https://www.eclipse.org/hono/docs/1.7/tags/"
                 />
diff --git a/docs/1.4/tags/index.html b/docs/1.4/tags/index.html
index 4ed0f48..69ea9d4 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?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/tags/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/tags/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/tags/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/tags/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/tags/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/tags/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/tags/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/tags/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/tags/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/tags/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/tags/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/tags/">dev</option>
@@ -2843,19 +2893,19 @@
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       <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 3206e2d..2b114d3 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?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/amqp-adapter/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/amqp-adapter/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/amqp-adapter/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/amqp-adapter/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/amqp-adapter/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/amqp-adapter/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/amqp-adapter/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/amqp-adapter/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/amqp-adapter/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/amqp-adapter/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/amqp-adapter/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/amqp-adapter/">dev</option>
@@ -3362,19 +3412,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 33b42ce..69fbae9 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?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/coap-adapter/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/coap-adapter/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/coap-adapter/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/coap-adapter/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/coap-adapter/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/coap-adapter/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/coap-adapter/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/coap-adapter/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/coap-adapter/">1.2</option>
@@ -1668,6 +1712,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/coap-adapter/">dev</option>
@@ -3604,19 +3650,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 fa9e88e..d3d3509 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/device-registry/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/device-registry/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/device-registry/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/device-registry/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/device-registry/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/device-registry/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/device-registry/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/device-registry/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/device-registry/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/device-registry/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/device-registry/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/device-registry/">dev</option>
@@ -2859,19 +2909,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 e82bc63..38ddff3 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/file-based-device-registry/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/file-based-device-registry/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/file-based-device-registry/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/file-based-device-registry/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/file-based-device-registry/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/file-based-device-registry/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/file-based-device-registry/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/file-based-device-registry/">1.3</option>
@@ -1640,6 +1682,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/file-based-device-registry/">dev</option>
@@ -2796,19 +2840,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 cda041a..c9b8cff 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/http-adapter/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/http-adapter/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/http-adapter/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/http-adapter/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/http-adapter/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/http-adapter/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/http-adapter/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/http-adapter/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/http-adapter/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/http-adapter/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/http-adapter/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/http-adapter/">dev</option>
@@ -3537,19 +3587,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 2d80aec..e7e0139 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?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/">dev</option>
@@ -2846,19 +2896,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 643fd27..af2a2a1 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1462,6 +1462,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/jmeter_load_tests/" selected>1.4</option>
@@ -1492,6 +1494,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/jmeter_load_tests/">1.3</option>
@@ -1522,6 +1526,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/jmeter_load_tests/">1.2</option>
@@ -1552,6 +1558,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/jmeter_load_tests/">1.1</option>
@@ -1582,6 +1590,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/jmeter_load_tests/">1.0</option>
@@ -2747,19 +2757,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 ec6c1c2..dbbde70 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473405" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473405" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473405"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473405"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473405"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/kura-adapter/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/kura-adapter/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/kura-adapter/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/kura-adapter/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/kura-adapter/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/kura-adapter/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/kura-adapter/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/kura-adapter/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/kura-adapter/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/kura-adapter/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/kura-adapter/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/kura-adapter/">dev</option>
@@ -3021,19 +3071,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 5737b70..5ee9b6f 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559519" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559519" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559519" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559519"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559519"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559519"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559519"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/mongodb-based-device-registry/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/mongodb-based-device-registry/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/mongodb-based-device-registry/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/mongodb-based-device-registry/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/mongodb-based-device-registry/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/mongodb-based-device-registry/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/mongodb-based-device-registry/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/mongodb-based-device-registry/">1.3</option>
@@ -1640,6 +1682,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/mongodb-based-device-registry/">dev</option>
@@ -2790,19 +2834,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 f2569c6..cb0e074 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/mqtt-adapter/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/mqtt-adapter/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/mqtt-adapter/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/mqtt-adapter/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/mqtt-adapter/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/mqtt-adapter/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/mqtt-adapter/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/mqtt-adapter/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/mqtt-adapter/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/mqtt-adapter/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/mqtt-adapter/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/mqtt-adapter/">dev</option>
@@ -3291,19 +3341,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
+    <script src="/hono/docs/js/clipboard.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621559520"></script>
+    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621559520"></script>
+    <script src="/hono/docs/js/jquery.sticky.js?1621559520"></script>
+    <script src="/hono/docs/js/featherlight.min.js?1621559520"></script>
+    <script src="/hono/docs/js/highlight.pack.js?1621559520"></script>
     <script>hljs.initHighlightingOnLoad();</script>
-    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621473405"></script>
-    <script src="/hono/docs/js/learn.js?1621473405"></script>
-    <script src="/hono/docs/js/hugo-learn.js?1621473405"></script>
+    <script src="/hono/docs/js/modernizr.custom-3.6.0.js?1621559520"></script>
+    <script src="/hono/docs/js/learn.js?1621559520"></script>
+    <script src="/hono/docs/js/hugo-learn.js?1621559520"></script>
 
-    <link href="/hono/docs/mermaid/mermaid.css?1621473405" rel="stylesheet" />
-    <script src="/hono/docs/mermaid/mermaid.js?1621473405"></script>
+    <link href="/hono/docs/mermaid/mermaid.css?1621559520" rel="stylesheet" />
+    <script src="/hono/docs/mermaid/mermaid.js?1621559520"></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 c91b911..ab6da45 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?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/fontawesome-all.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hybrid.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/featherlight.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/auto-complete.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/theme.css?1621473404" rel="stylesheet">
-    <link href="/hono/docs/css/hugo-theme.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/nucleus.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/auto-complete.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/atom-one-dark-reasonable.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1621559520" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/theme-hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/theme-hono.css?1621559520" rel="stylesheet">
     
-    <link href="/hono/docs/css/hono.css?1621473404" rel="stylesheet">
+    <link href="/hono/docs/css/hono.css?1621559520" rel="stylesheet">
 
-    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621473404"></script>
+    <script src="/hono/docs/js/jquery-3.3.1.min.js?1621559520"></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?1621473404"></script>
-<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/lunr.min.js?1621559520"></script>
+<script type="text/javascript" src="/hono/docs/js/auto-complete.js?1621559520"></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?1621473404"></script>
+<script type="text/javascript" src="/hono/docs/js/search.js?1621559520"></script>
 
     
   </div>
@@ -1456,7 +1456,39 @@
                   
                     
                     
-                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/sigfox-adapter/">stable (1.7)</option>
+                      <option id="stable" value="https://www.eclipse.org/hono/docs/user-guide/sigfox-adapter/">stable (1.8)</option>
+                    
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+                  
+              
+          
+              
+              
+                  
+              
+                  
+                    
+                    
+                      <option id="1.8" value="https://www.eclipse.org/hono/docs/1.8/user-guide/sigfox-adapter/">1.8</option>
                     
                   
               
@@ -1484,6 +1516,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/user-guide/sigfox-adapter/">1.7</option>
@@ -1514,6 +1548,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/user-guide/sigfox-adapter/">1.6</option>
@@ -1544,6 +1580,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/user-guide/sigfox-adapter/">1.5</option>
@@ -1574,6 +1612,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/user-guide/sigfox-adapter/" selected>1.4</option>
@@ -1604,6 +1644,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/user-guide/sigfox-adapter/">1.3</option>
@@ -1634,6 +1676,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.2" value="https://www.eclipse.org/hono/docs/1.2/user-guide/sigfox-adapter/">1.2</option>
@@ -1664,6 +1708,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.1" value="https://www.eclipse.org/hono/docs/1.1/user-guide/sigfox-adapter/">1.1</option>
@@ -1694,6 +1740,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="1.0" value="https://www.eclipse.org/hono/docs/1.0/user-guide/sigfox-adapter/">1.0</option>
@@ -1724,6 +1772,8 @@
                   
               
                   
+              
+                  
                     
                     
                       <option id="dev" value="https://www.eclipse.org/hono/docs/dev/user-guide/sigfox-adapter/">dev</option>
@@ -2971,19 +3021,19 @@
     <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?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.min.js?1621473405"></script>
-    <script src="/hono/docs/js/perfect-scrollbar.jquery.min.js?1621473405"></script>
-    <script src="/hono/docs/js/jquery.sticky.js?1621473405"></script>
-    <script src="/hono/docs/js/featherlight.min.js?1621473405"></script>
-    <script src="/hono/docs/js/highlight.pack.js?1621473405"></script>
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