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<p>BACnet MVD</p>

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<h3 class="std">4.3.3 Object User Identity</h3>
<p>An object may be labeled for human identification where the <i>Name</i> may indicate a well-known identifier. While there is no restriction on usage of such identifier, it is recommended the <i>Name</i> is unique within it's containing scope. Further guidance on usage is provided at specific entities; for example, for spaces, the <i>Name</i> may reflect a room number. An object may have a description provided via the <i>Description</i> attribute that provides further context in identifying or locating the object.</p>

<p>Specific subtypes introduce additional attributes for <i>User Identity</i>.</p>
<ul>
 <li>Spatial objects may be further identified via the <i>LongName</i> attribute. This value should generally correspond to building signage describing floor levels or rooms. While the <i>Name</i> attribute generally provides a coded or abbreviated identifier, the <i>LongName</i> provides a functional name for the location such as "Reception Area". See concept template <i>Spatial Element Occurrence Attributes</i></li>
 <li>Physical elements may be further identified via the <i>Tag</i> attribute. This is a human readable identifier such as an element or item number While there is no restriction on usage of such tags, it is recommended the <i>Tag</i> is unique within it's containing scope. See concept template <i>Element Occurrence Attributes</i></li>
</ul><p class="fig-ref">Figure 17 illustrates an instance diagram.</p>
<table><tr><td><img alt="Object User Identity" src="./diagrams/object-user-identity.png" usemap="#f17"><map name="f17"><area shape="rect" coords="8,8,176,212" href="../ifckernel/lexical/ifcobject.htm" alt="IfcObject" /><area shape="rect" coords="208,8,376,20" href="../ifcmeasureresource/lexical/ifclabel.htm" alt="IfcLabel" /><area shape="rect" coords="208,40,376,52" href="../ifcmeasureresource/lexical/ifctext.htm" alt="IfcText" /><area shape="rect" coords="208,72,376,156" href="../ifckernel/lexical/ifcreldefinesbytype.htm" alt="IfcRelDefinesByType" /><area shape="rect" coords="408,8,576,188" href="../ifckernel/lexical/ifctypeobject.htm" alt="IfcTypeObject" /><area shape="rect" coords="608,8,776,20" href="../ifcmeasureresource/lexical/ifclabel.htm" alt="IfcLabel" /><area shape="rect" coords="608,40,776,52" href="../ifcmeasureresource/lexical/ifctext.htm" alt="IfcText" /></map></td></tr><tr><td><p class="figure">Figure 17 &mdash; Object User Identity</p></td></tr></table>

<hr/>
<h4>BACnet View</h4>
<table class="exchange">
<tr><th>Entity</th></tr><tr><td><a href="../ifcbuildingcontrolsdomain/lexical/ifccontroller.htm">IfcController</a></td></tr>
<tr><td><a href="../ifcsharedbldgserviceelements/lexical/ifcdistributionsystem.htm">IfcDistributionSystem</a></td></tr>
<tr><td><a href="../ifcprocessextension/lexical/ifcevent.htm">IfcEvent</a></td></tr>
<tr><td><a href="../ifccontrolextension/lexical/ifcperformancehistory.htm">IfcPerformanceHistory</a></td></tr>
<tr><td><a href="../ifcprocessextension/lexical/ifcprocedure.htm">IfcProcedure</a></td></tr>
<tr><td><a href="../ifckernel/lexical/ifcproxy.htm">IfcProxy</a></td></tr>
<tr><td><a href="../ifcbuildingcontrolsdomain/lexical/ifcsensor.htm">IfcSensor</a></td></tr>
<tr><td><a href="../ifcprocessextension/lexical/ifctask.htm">IfcTask</a></td></tr>
<tr><td><a href="../ifcproductextension/lexical/ifczone.htm">IfcZone</a></td></tr>
</table>
<details><summary>mvdXML Specification</summary><div class="xsd"><code class="xsd">
&lt;?xml version=&quot;1.0&quot;?&gt;<br/>
&lt;ConceptTemplate xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot; xmlns:xsd=&quot;http://www.w3.org/2001/XMLSchema&quot; uuid=&quot;c19ec186-9cfd-47fc-a4d4-9fb35008d04a&quot; name=&quot;Object User Identity&quot; status=&quot;sample&quot; applicableSchema=&quot;IFC4&quot; applicableEntity=&quot;<a href="../ifckernel/lexical/ifcobject.htm">IfcObject</a>&quot;&gt;<br/>
&nbsp;&nbsp;&lt;Rules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&lt;AttributeRule RuleID=&quot;ObjectName&quot; AttributeName=&quot;Name&quot;&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRule EntityName=&quot;<a href="../ifcmeasureresource/lexical/ifclabel.htm">IfcLabel</a>&quot; /&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&lt;/AttributeRule&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&lt;AttributeRule RuleID=&quot;ObjectDescription&quot; AttributeName=&quot;Description&quot;&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRule EntityName=&quot;<a href="../ifcmeasureresource/lexical/ifctext.htm">IfcText</a>&quot; /&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&lt;/AttributeRule&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&lt;AttributeRule AttributeName=&quot;IsTypedBy&quot;&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRule EntityName=&quot;<a href="../ifckernel/lexical/ifcreldefinesbytype.htm">IfcRelDefinesByType</a>&quot;&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;AttributeRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;AttributeRule AttributeName=&quot;RelatingType&quot;&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRule EntityName=&quot;<a href="../ifckernel/lexical/ifctypeobject.htm">IfcTypeObject</a>&quot;&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;AttributeRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;AttributeRule RuleID=&quot;TypeName&quot; AttributeName=&quot;Name&quot;&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRule EntityName=&quot;<a href="../ifcmeasureresource/lexical/ifclabel.htm">IfcLabel</a>&quot; /&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/AttributeRule&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;AttributeRule RuleID=&quot;TypeDescription&quot; AttributeName=&quot;Description&quot;&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;EntityRule EntityName=&quot;<a href="../ifcmeasureresource/lexical/ifctext.htm">IfcText</a>&quot; /&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/AttributeRule&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/AttributeRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/EntityRule&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/AttributeRule&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/AttributeRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/EntityRule&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/EntityRules&gt;<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&lt;/AttributeRule&gt;<br/>
&nbsp;&nbsp;&lt;/Rules&gt;<br/>
&lt;/ConceptTemplate&gt;<br/>
</code></div>
</details>
</p>
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