Why NavigationProperty has ContainsTarget=true for all EntityType in $metadata for outlook.com? <p>I am working on $metadata of Outlook.com and parsing EntityType for the specific entity. I would like to know, Why attribute <strong>ContainsTarget</strong> has "<strong>true</strong>" value for all NavigationProperty.?</p> <p>Attaching the snippet for Message entity where NavigationProperty has ContainsTarget attribute.</p> <pre><code>&lt;EntityType Name="Message" BaseType="Microsoft.OutlookServices.Item"&gt; &lt;Property&gt;&lt;/property&gt; . . &lt;Property&gt;&lt;/property&gt; &lt;NavigationProperty Name="Attachments" Type="Collection(Microsoft.OutlookServices.Attachment)" ContainsTarget="true"&gt; &lt;/NavigationProperty&gt; &lt;/EntityType&gt; </code></pre>