- From: Reto Bachmann-Gmür <rbg@talis.com>
- Date: Wed, 05 Sep 2007 18:27:43 +0200
- To: Pete Johnston <Pete.Johnston@eduserv.org.uk>
- CC: Bruce D'Arcus <bdarcus@gmail.com>, "Hammond, Tony" <t.hammond@nature.com>, semantic-web@w3.org
Pete Johnston wrote: > Reto said: > > >> if the datatype is the context, and given that two literals >> with different datatypes cannot be equals (not sure if this >> is true for custom datatypes) dc:identifiers is an >> owl:inverseFunctionalProperty, right? >> > > I'm not sure that's the case. I think DCMI is pretty vague about what it means by "context" here ;-) > > But generally I think > > doc:x dc:identifier "12345" . > > and > > doc:y dc:identifier "12345" . > > is not - in the global "context" - sufficient to conclude that doc:x and doc:y are the same resource, and that holds even with a typed literal as object. > > That's always been my assumption, anyway. > If the context is the datatype as Bruce has been suggested on the DCMI list then I think the part "within a given context" of the definition of dc:identifier[1] is meaningless in the context of RDF. Otherwise, if there are Contexts in RDF I would like to know more about them, if there aren't it dc:identifier should probably not be used in RDF especially not in an RDF primer. reto 1."Identifier: An unambiguous reference to the resource within a given context." quoted on http://www.w3.org/TR/rdf-primer/ -- Reto Bachmann-Gmür Talis Information Limited Book your free place now at Talis Insight 2007 www.talis.com/insight Find out more about Talis at www.talis.com Shared InovationTM Any views or personal opinions expressed within this email may not be those of Talis Information Ltd.
Received on Wednesday, 5 September 2007 16:27:50 UTC