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Required?: NO (within a content-handler block)
Default Value: YES
Possible values: YES, NO
If Yes then the content item will have a Copy option in its contextual menu. If No then it will not.
If content copy is supported then the external-id + content-id must be checked on each access and new content items created in the system with a new external id (unless all copies pointing to the same item in the system is desired).