- Title: Repository subsystems are flexible in type of entities stored Objects can be associated with a PREMIS event service
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- Story: Subsystems may be added that support arbitrary types of entities (eg curation events) to be stored in relation to an object, provided they fulfill a contract for export.An object can be associated with a listener for PREMIS events. This listener should receive event message rather than whole documents, but be able to export a log of the event history. Attempting to emulate this in Fedora 3.x requires constant replacement of an XML document, and has collision problems when integrated into a system of parallel, distributed repository processes.