[foaf-dev] foaf:topic and dcterms:subject

Simon Reinhardt simon.reinhardt at koeln.de
Thu Apr 23 14:12:50 CEST 2009


Danny Ayers wrote:
> I was looking for a 'topic' term and landed on dcterms:subject [1]
> first, but then yesterday chatting with Leigh he mentioned foaf:topic
> [2]...
> 
> I'm guessing the old DC Elements dc:subject would often be used with
> literal object, but the DC Terms definition explicitly suggests a
> non-literal object. So unless I'm missing something, these properties
> have very similar semantics (only real difference being foaf:topic
> rdfs:range foaf:Document).
> 
> foaf:topic is presumably already too well deployed to deprecate, so to
> get some kind of alignment might it make sense to make foaf:topic
> rdfs:subPropertyOf dcterms:subject ?

There's also sioc:topic [1] which is indeed declared as a sub-property of dcterms:subject.

Regards,
  Simon

[1] http://rdfs.org/sioc/spec/#term_topic


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