| http://www.w3.org/ns/prov#value | - The backup enumerating component 480 can return the unique property (e.g., path id, numeric identifier, item id, . . . ) of an item in the following examples: the item has been updated, any reference relationship or embedding relationship where the item is the source has been updated, a holding relationship where the item is a target has been updated, an extension of the item has been updated, etc
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