Re: Assumptions about URIs
>Bent Rasmussen scripsit: > > > - "Does the URI 'http://www.w3.org' identify an > > organisation called W3C or a location on the Web?" > >For informal purposes, it can refer to either, just as informally >I can be called either "John Cowan" or "mailto:cowan@c...". Alright, so let's move to formal: >For RDF/TM purposes, when it is necessary to make rigorous >distinctions, then there are two possible answers: > >- A URI means what the owner of the authority-part (DNS name) says it > means. On this basis, "John Cowan" is a non-URI name of *me*, > whereas "mailto:cowan@c..." is a URI name of *one of my > mailboxes*. So you're saying that the owner of "ccil.org" gets to choose what "mailto:cowan@c..." is? It could be a solar system if they preferred, because they're the authority -- regardless of what mailto is intended for! In other words: intent is irrelevant because it is has no substance in the knowledge representation system; although it might have, i.e. there are statements about what the type of resources identified in the TEL scheme is. >- The meaning of a URI must be inferred from the statements made > about it. In this case we would have to look to what has been said. Alright, so we can use rdf:type to indicate the type but then what about the context, the name space, should we get "used" to things like <http://example.com/bookx> <http://example.com/publisher> <tel:2...> <tel:2> rdf:type ex:Person and just say that name spaces and their intended range is irrelevant? It may work but still seems a bit nicer to align the inferred meaning of a resource with the meaning allowed by the name space. But perhaps that's just extra work that nobody needs. >-- >John Cowan http://www.ccil.org/~cowan cowan@c... >To say that Bilbo's breath was taken away is no description at all. There >are no words left to express his staggerment, since Men changed the >language >that they learned of elves in the days when all the world was wonderful. > --_The Hobbit_ _________________________________________________________________ Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com
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