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     <meta data-n-head="true" charset="utf-8"><meta data-n-head="true" content="width=device-width,initial-scale=1" name="viewport"><meta data-n-head="true" content="Eclipse Unide: Understand Industry devices" name="description" data-hid="description"><title data-n-head="true">Eclipse unide - Frequently asked questions</title><link href="/unide/favicon.ico" rel="icon" data-n-head="true" type="image/x-icon"><base href="/unide/"><link href="/unide/files/app.ce93f25ec8e6cdcb172e2896599524df.css" rel="stylesheet"><style data-vue-ssr-id="771fc815:0">body .sidebar div{margin-bottom:2em;font-size:.875em}body .sidebar div .subtitle{margin-bottom:.5rem}</style><style data-vue-ssr-id="d5b0f30e:0">@keyframes spinAround{0%{transform:rotate(0)}to{transform:rotate(359deg)}}header.nav-header{box-shadow:0 3px 5px 0 #ddd;margin-bottom:2em;padding-bottom:0}header.nav-header nav.navbar{display:flex;align-items:flex-end;border-bottom:5px solid #50237f}header.nav-header nav.navbar .navbar-burger{margin-left:0;height:auto}header.nav-header nav.navbar .navbar-burger span{height:2px;width:25px}header.nav-header nav.navbar .navbar-burger span:first-child{margin-top:-9px}header.nav-header nav.navbar .navbar-burger span:nth-child(3){margin-top:7px}header.nav-header nav.navbar .navbar-brand{align-self:stretch}header.nav-header nav.navbar .navbar-brand .navbar-item img{max-height:none;width:240px}header.nav-header nav.navbar .navbar-item,header.nav-header nav.navbar .navbar-link,header.nav-header nav.navbar .navbar-link a{color:#a7a7a7}header.nav-header nav.navbar .navbar-item.is-active,header.nav-header nav.navbar .navbar-item:hover,header.nav-header nav.navbar .navbar-link a.is-active,header.nav-header nav.navbar .navbar-link a:hover,header.nav-header nav.navbar .navbar-link.is-active,header.nav-header nav.navbar .navbar-link:hover{color:#78be20}header.nav-header nav.navbar .navbar-item:hover,header.nav-header nav.navbar .navbar-link a:hover,header.nav-header nav.navbar .navbar-link:hover{background-color:transparent;text-decoration:none;font-weight:700}header.nav-header nav.navbar .navbar-item .dropdown-trigger,header.nav-header nav.navbar .navbar-link .dropdown-trigger,header.nav-header nav.navbar .navbar-link a .dropdown-trigger{display:flex}@media screen and (min-width:1024px){.nav-header .container>.navbar .navbar-menu{margin-right:1rem}}@media screen and (max-width:1007px){header.nav-header nav.navbar{flex-direction:column;align-items:stretch}header.nav-header nav.navbar .navbar-menu{order:1;box-shadow:none}}@media screen and (min-width:1008px){nav.navbar .container .navbar-menu{height:40px}}</style><style data-vue-ssr-id="25f4887a:0">@keyframes spinAround{0%{transform:rotate(0)}to{transform:rotate(359deg)}}</style><style data-vue-ssr-id="52cedc5e:0">@keyframes spinAround{0%{transform:rotate(0)}to{transform:rotate(359deg)}}.card.collapsibleCard>header{cursor:pointer;background-color:#f5f5f5;border-bottom:1px solid hsla(0,0%,4%,.1)}.card.collapsibleCard>header .card-header-icon{text-decoration:none}.card.collapsibleCard>header .card-header-title{font-weight:400}.card.collapsibleCard>header p{margin-bottom:0}.card.collapsibleCard.collapsed header{border-bottom:none}.card.collapsibleCard>div.collapsing{position:relative;height:0;overflow:hidden;display:block;transition-property:height;transition-duration:.35s;transition-timing-function:ease}</style><style data-vue-ssr-id="fc44206e:0">.recentPosts ul{list-style:none}</style><style data-vue-ssr-id="3dafb0ac:0">.blogArchives ul{list-style:none}</style><style data-vue-ssr-id="3fcbd066:0">@keyframes spinAround{0%{transform:rotate(0)}to{transform:rotate(359deg)}}.footer{font-size:.875em;border-top:1px solid #dbdbdb;padding-top:1.25rem;margin-top:1rem;padding:2rem 0}</style>
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     Frequently Asked Questions
   </h1><div>
     We assembled a few frequently asked questions about the Production Performance Protocol (PPMP) and the Unide project. You're welcome to raise your questions in the <a href="https://www.eclipse.org/forums/index.php/f/348/">Unide forum</a>.
   </div><div class="accordion"><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
         What does "Unide" stand for?
       </p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>The projects name is derived from understand industry devices. Other ideas like connect industry machines turned out to have meanings in foreign languages or being trademarked already.<br>Regarding the logo: Unide and PPMP's goal is to enable you to connect machines and receive their measurements / alerts. The logo represents that. It has you ('<i>U</i>') highlighted and connects to rings. As a side note, we found that the words almost look like <i>you-nice</i>.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
         What's the difference between Unide and PPMP?
       </p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>The Production Performance Mangement Protocol (PPMP) is the name of the structure of the <a href="specification/">payload</a> whereas Unide is the project that aims to provide sample implementations and further development of this protocol in and with the Eclipse Open Source community. Nevertheless, PPMP is an open suggestion, and everyone is welcome to using it, even without contributing to the Unide project.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
         Why introducing another industry protocol?
       </p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>There are already plenty of transport protocols (REST, AMQP, etc.) available. PPMP aims to provide the very industry specific semantic structure for their payload. So it aims to complete such IoT transport infrastructure and bridge the gap to the manufacturing domain. OPC-DA/UA on the other hand covers full service oriented architecture, security concerns and information model, which makes it more complex and costly to implement and operate. In some use cases, this is not necessary.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
         Why have you choosen JSON as syntax?
       </p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>JSON is a good fit regarding understandability and size. Having a structured and comprehensible basis is the first step for acceptance in the industry. In the spirit of Donald E. Knuth ("<a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.103.6084"><i>premature optimization is the root of all evil</i></a>"), further compacting is possible in a later stage.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
         Why are time and measurement points separated in multiple arrays?
       </p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>We have discussed multiple options for <a href="specification">series</a>: having an array of<br>tupels (<code>[[0, 23.34],[...],...]</code>),<br>plain objects (<code>[{time: 0, temperature: 23.34}, {...}...]</code>),<br>objects with time as key (<code>{ "0": [23.34,...],...}</code>) and other.<br>When parsing, we had to recognize, that unsigned long int for time and floating point measurements are of different types. Also, all former variants are more verbose due to additional brackets, commas or quotation marks. We believe that the current version is a good compromise between readability and structure.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
         I'm interested in Unide/PPMP. How can I contribute?
       </p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>The first goal of Unide is to provide sample client/server implementations of PPMP. Secondly, we're looking forward to improving PPMP in future versions together with the eclipse community.<br>If you want to contribute with source code, use cases or implementing it in your devices, let us know and discuss in the <a href="https://github.com/eclipse/unide">unide forum</a> or by forking / filing an issue on <a href="https://github.com/eclipse/unide">github</a>.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
         Why have you included content-spec uri, if that can also be expressed in the a REST url already?
       </p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div><a href="specification">content-spec</a> is included in the payload, because PPMP does not rely on a specific transport protocol (like REST).</div></div></div></div></div></div><div class="sidebar column is-3 is-offset-1"><div class="recentPosts"><h4 class="subtitle is-5">
     Recent Posts
   </h4><ul><li><a href="/unide/blog/2018/9/4/Template-for-PPMP-transformation">
         PPMP Use Cases: Template for PPMP transformation
       </a><li><a href="/unide/blog/2018/3/26/Release-0.2.0">
         Unide 0.2.0 released
       </a><li><a href="/unide/blog/2018/2/13/grinding-machine-scenario">
         PPMP Use Cases: Unide and the Eclipse Production Performance Management Testbed
       </a><li><a href="/unide/blog/2018/2/11/Transform-PPMP-with-camel">
         PPMP Use Cases: Simple Transformation with Apache Camel
       </a><li><a href="/unide/blog/2018/1/26/New-website">
         Updated Website
       </a></ul></div><div class="blogArchives"><h4 class="subtitle is-5">
     Blog Archives
   </h4><ul><li><a href="/unide/blog/2018/9">
         October 2018
       </a>
       (1)
     <li><a href="/unide/blog/2018/3">
         April 2018
       </a>
       (1)
     <li><a href="/unide/blog/2018/2">
         March 2018
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       (2)
     <li><a href="/unide/blog/2018/1">
         February 2018
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     <li><a href="/unide/blog/2017/10">
         November 2017
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       (2)
     <li><a href="/unide/blog/2017/6">
         July 2017
       </a>
       (2)
     <li><a href="/unide/blog/2017/3">
         April 2017
       </a>
       (1)
     <li><a href="/unide/blog/2016/9">
         October 2016
       </a>
       (4)
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	Frequently Asked Questions
	</h1><div>
	We assembled a few frequently asked questions about the Production Performance Protocol (PPMP) and the Unide project. You're welcome to raise your questions in the <a href="https://www.eclipse.org/forums/index.php/f/348/">Unide forum</a>.
	</div><div class="accordion"><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
	What does "Unide" stand for?
	</p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>The projects name is derived from understand industry devices. Other ideas like connect industry machines turned out to have meanings in foreign languages or being trademarked already.<br>Regarding the logo: Unide and PPMP's goal is to enable you to connect machines and receive their measurements / alerts. The logo represents that. It has you ('<i>U</i>') highlighted and connects to rings. As a side note, we found that the words almost look like <i>you-nice</i>.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
	What's the difference between Unide and PPMP?
	</p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>The Production Performance Mangement Protocol (PPMP) is the name of the structure of the <a href="specification/">payload</a> whereas Unide is the project that aims to provide sample implementations and further development of this protocol in and with the Eclipse Open Source community. Nevertheless, PPMP is an open suggestion, and everyone is welcome to using it, even without contributing to the Unide project.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
	Why introducing another industry protocol?
	</p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>There are already plenty of transport protocols (REST, AMQP, etc.) available. PPMP aims to provide the very industry specific semantic structure for their payload. So it aims to complete such IoT transport infrastructure and bridge the gap to the manufacturing domain. OPC-DA/UA on the other hand covers full service oriented architecture, security concerns and information model, which makes it more complex and costly to implement and operate. In some use cases, this is not necessary.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
	Why have you choosen JSON as syntax?
	</p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>JSON is a good fit regarding understandability and size. Having a structured and comprehensible basis is the first step for acceptance in the industry. In the spirit of Donald E. Knuth ("<a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.103.6084"><i>premature optimization is the root of all evil</i></a>"), further compacting is possible in a later stage.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
	Why are time and measurement points separated in multiple arrays?
	</p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>We have discussed multiple options for <a href="specification">series</a>: having an array of<br>tupels (<code>[[0, 23.34],[...],...]</code>),<br>plain objects (<code>[{time: 0, temperature: 23.34}, {...}...]</code>),<br>objects with time as key (<code>{ "0": [23.34,...],...}</code>) and other.<br>When parsing, we had to recognize, that unsigned long int for time and floating point measurements are of different types. Also, all former variants are more verbose due to additional brackets, commas or quotation marks. We believe that the current version is a good compromise between readability and structure.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
	I'm interested in Unide/PPMP. How can I contribute?
	</p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div>The first goal of Unide is to provide sample client/server implementations of PPMP. Secondly, we're looking forward to improving PPMP in future versions together with the eclipse community.<br>If you want to contribute with source code, use cases or implementing it in your devices, let us know and discuss in the <a href="https://github.com/eclipse/unide">unide forum</a> or by forking / filing an issue on <a href="https://github.com/eclipse/unide">github</a>.</div></div></div></div><div class="card collapsibleCard collapsed"><header class="card-header"><p class="card-header-title">
	Why have you included content-spec uri, if that can also be expressed in the a REST url already?
	</p><a class="card-header-icon"><span class="icon"><i class="fa fa-angle-up"></i></span></a></header><div style="display:none"><div class="card-content"><div><a href="specification">content-spec</a> is included in the payload, because PPMP does not rely on a specific transport protocol (like REST).</div></div></div></div></div></div><div class="sidebar column is-3 is-offset-1"><div class="recentPosts"><h4 class="subtitle is-5">
	Recent Posts
	</h4><ul><li><a href="/unide/blog/2018/9/4/Template-for-PPMP-transformation">
	PPMP Use Cases: Template for PPMP transformation
	</a><li><a href="/unide/blog/2018/3/26/Release-0.2.0">
	Unide 0.2.0 released
	</a><li><a href="/unide/blog/2018/2/13/grinding-machine-scenario">
	PPMP Use Cases: Unide and the Eclipse Production Performance Management Testbed
	</a><li><a href="/unide/blog/2018/2/11/Transform-PPMP-with-camel">
	PPMP Use Cases: Simple Transformation with Apache Camel
	</a><li><a href="/unide/blog/2018/1/26/New-website">
	Updated Website
	</a></ul></div><div class="blogArchives"><h4 class="subtitle is-5">
	Blog Archives
	</h4><ul><li><a href="/unide/blog/2018/9">
	October 2018
	</a>
	(1)
	<li><a href="/unide/blog/2018/3">
	April 2018
	</a>
	(1)
	<li><a href="/unide/blog/2018/2">
	March 2018
	</a>
	(2)
	<li><a href="/unide/blog/2018/1">
	February 2018
	</a>
	(1)
	<li><a href="/unide/blog/2017/10">
	November 2017
	</a>
	(2)
	<li><a href="/unide/blog/2017/6">
	July 2017
	</a>
	(2)
	<li><a href="/unide/blog/2017/3">
	April 2017
	</a>
	(1)
	<li><a href="/unide/blog/2016/9">
	October 2016
	</a>
	(4)
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