Код:
<mx:DataGrid id="dg" width="100%" height="100%" dataProvider="{XMLDATA.ITEM}" variableRowHeight="true" > <mx:columns>
<mx:DataGridColumn >
<mx:itemRenderer>
<mx:Component>
<mx:Image source="{data.@IMAGE}"/>
</mx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
...