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All, I am looking at the LoC relators at id.loc.gov, and am trying to understand the implications of the multiple declarations for relator terms. <rdfs:subPropertyOf rdf:resource="http://purl.org/dc/elements/1.1/contributor"/> <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/> <rdf:type rdf:resource="http://id.loc.gov/ontologies/bibframe/Role"/> dct:contributor is not an Object Property; there is no object type given, so I suppose it is de facto an Annotation Property. I read the next statement as narrowing, so at statement 2 we have: subproperty of dct:contributor AND an owl:ObjectProperty If my reading is correct, it would be a violation of this to use the relator with a string rather than a thing. (Stop me here if I'm wrong.) Then the 3rd statement appears to say that the relator is a bf:Role, which is a BIBFRAME-specific class. I can't wrap my head around the functionality of this statement and would love a brief explanation. I'm undoubtedly not into BIBFRAME deep enough to grok this. Also, my reading is that each relator is ALL THREE OF THESE; this is an AND not at OR. Right? Thanks for any help, kc -- Karen Coyle [log in to unmask] http://kcoyle.net m: +1-510-435-8234 skype: kcoylenet/+1-510-984-3600