If your repository uses composite repository item IDs, you can specify the ID with its encoded form, or in brackets with the elements of the ID separated by columns. For example, if an ID is composed of the string elements Massachusetts, USA, and Earth and the separator character is the default, : (colon), you can specify the ID in one 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>
