I was working on the crosswalk that generates DataCite metadata for DOI submissions through EZID, and saw a potential problem. So long as an Item has one value each for dc.rights and dc.rights.uri, it's easy enough to compose a <rights rightsURI='foo'>bar</rights> element. But I don't think there is any rule requiring only single values here. Multiple rights statements are actually rather common on software these days, and I don't see why they wouldn't be useful with some works of any type.
Notice that it's not unreasonable to have both paired and unpaired
values of dc.rights. I don't see any support for sparse ordered lists
of metadata values, so how to ensure that the pairs line up?
So, please discuss:
1. If and when we build real schema support for metadata namespaces,
we may want to include cardinality rules. Some fields may not
have a sensible meaning for multiple values. We may need to
*require* at least one value for other fields.
2. dc.rights/dc.rights.uri would seem to be a nice entering wedge for
support of hierarchial metadata structures, since clearly some
uses of these fields (CC for example) are naturally paired.
--
Mark H. Wood
Lead Technology Analyst
University Library
Indiana University - Purdue University Indianapolis
755 W. Michigan Street
Indianapolis, IN 46202
317-274-0749
www.ulib.iupui.edu
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