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On Thu, May 14, 2009 at 17:35, Rob Sanderson <[log in to unmask]> wrote: > For example, the owl:sameAs predicate is used to express that the > subject and object are the same 'thing'. Then the application can infer > that if a owl:sameAs b, and a x y, then b x y. Yes, but there's a snag; as RDF work only on the URI resource level (no added semantics to the typification of the URI resource) if someone does an owl:sameAs between an identifier of a thing and a locator of a thing (a locator being the resource itself as opposed to being an identifier; example are you talking about Sun Corp (http://sun.com/) or are you talking about their website (http://sun.com/)) you can get a nasty case of integrity rot, and I've not seen any proposals to address this issue (the RDF world is essentially assuming modeling from the viewpoint of everything being true). I guess Mike don't like RDF *nor* Topic Maps now. :) Regards, Alex -- --------------------------------------------------------------------------- Project Wrangler, SOA, Information Alchemist, UX, RESTafarian, Topic Maps ------------------------------------------ http://shelter.nu/blog/ --------