If your repository uses composite repository item IDs, you can specify the ID either using its encoded form or in brackets, with the elements of the ID separated by columns. For example, if an ID was composed of the string elements Massachusetts, USA, and Earth and the separator character was the default, : (colon), you could specify the ID in either of these forms:
<add-item item-descriptor="states" id="Massachusetts:USA:Earth">
<set-property name="capital" value="Boston"/>
</add-item>
<add-item item-descriptor="states" id="[Massachusetts,USA,Earth]">
<set-property name="capital" value="Boston"/>
</add-item>
