• In Grids it is possible to create Occurrence Columns. Occurrence columns are used to look for occurrences of an item in a list given a defined part type. It can also be used to manage that list by adding, removing and synchronizing Items. 
• To describe how this works we have set up a simplified scenario 
• Consider the following: I want to see what functionality that is planned for which milestone and its statut with respect to versioning
  

Example Meta model

This is the result we want

This is the definition

<Grid>
	<Columns>
		<ItemNameColumn caption="Function" width="200"/>
		<!--Columns can be defined based on data in the models. This is performed just like normal data collection.-->    
		<ForEachPart type="MILS">
			<DefObj>                                              
				<!--For every Milestone, create a column. Set the property caption to its name for readability.-->
				<!--The property partSID defines which part type that shall be used to look for an occurence of the Item defined in <Row/>.-->
				<!--If the property readOnly is set to false, it is possible to use the OccurrenceColumn to connect,-->
                <!-- disconnect and synchronize towards the OccurenceColumn Items-->             
				<OccurrenceColumn caption="#{Name}" partSID="EFUN" width="200" readOnly="false"/>
			</DefObj>
		</ForEachPart>    
	</Columns>
	<ForEach select="/PTUR/IURQ">    
        <Row/>           
    </ForEach>  
</Grid>