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dc : identifier is used for object files but also for jump off pages and even for bibliographic citations . The record of a working paper that later is published as a journal article is not used to describe the journal article too . The major advantage of this packaging format is that it is being developed by the CCSDS , so that it is being developed with OAIS in mind from the outset . Thomas Place ( Netherlands ) : One problem is identifying the object files . For digital preservation and for full text search engines it is necessary to identify unambiguously the object files . In DCMI practice , an element refinement refines just one parent DCMI property . To intall the macros copy both files into a macro file ( it can be opened by going to tools - > macros and select a file in the combo or create new file and select edit ) and for ease of use make a tool bar button for the macro .