<ol style="list-style-type:lower-alpha">
<li>it’s value has been changed (the property knows its new and old value),</li>
<li>it’s ValidationTimeStamp has be been set</li>
</ol>
</li>
<li>When a new primary child is added to a relation. Primary in this context means the first level of object relation, the directly connected object so to say. That means adding such a child counts as a change for the owner object and the UpdateTimeStamp will be set. A child can be anything (Attributes, Relationdata, etc).</li>
</ol>
== On PropertyLevel / BaseProperty ==