Supertype and Subtype relationship

Like the type-instance relationship, this relationship is by its very nature binary, and like type-instance it is represented in both RDF and Topic Maps using a special vocabulary external to the model itself. In RDF, the fact that A is a subclass of B is expressed with the statement "ex:A rdfs:subclassOf ex:B", whereas in Topic Maps it is expressed with the association "iso:supertype-subtype(A : iso:subtype, B: iso:supertype)".

RDFTM

  • Every statement of the form ex:A rdfs:subclassOf ex:B becomes a Topic Maps association of the form iso:supertype-subtype(x : iso:subtype, y : iso:supertype).
TMRDF

  • Every association of the form iso:supertype-subtype(x : iso:subtype, y : iso:supertype) becomes a RDF statement of the form ex:A rdfs:subclassOf ex:B.

Revision: r1.3 - 30 Oct 2005 - 17:56 - ValentinaPresutti
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