Is simple Dublin Core metadata sufficient or are qualifiers needed? If they are, which ones should be used and how will interoperability between different domains be handled?
The 15 Dublin Core metadata elements form a fairly basic cross-domain core that ensures a degree of commonality across domains and applications. In order to less ambiguously express richer or more structured information than is possible in the 15 elements, the Dublin Core community supports the notion of qualification, using element refinements and encoding schemes. An initial set of these is defined by the Dublin Core community, in the Dublin Core Qualifiers , and these are a good place to start. Where the agreed qualifiers do not meet your needs, it is possible to define others, either within your project or as part of a broader domain-based interest group. In defining new qualifiers it is important to ensure that: – they REFINE, and do not EXTEND, the definition of one of the Dublin Core elements – they do not OVERLAP with the function of an existing qualifier – if the qualifier is IGNORED by a system/user that does not understand it, the value that is left should still make sense w
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