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Re: rdfms-difference-between-ID-and-about

From: Brian McBride <bwm@hplb.hpl.hp.com>
Date: Thu, 05 Jul 2001 17:26:49 +0100
Message-ID: <3B449549.C2E7F3DE@hplb.hpl.hp.com>
To: Thomas Enzi <Thomas.Enzi@wu-wien.ac.at>
CC: www-rdf-comments@w3.org, Bernd.Simon@wu-wien.ac.at
Hi Thomas,

Thomas Enzi wrote:
> Dear members of the working group,
> regarding to one of the points that are "under discussion" I wanted to
> comment that from my point of view there is a need of differentiating
> between rdf:ID and rdf:about as Aaron's Proposal 2.

Thank you for the input Thomas.  I have forwarded your message to the working

> Within the project that I am into I have explicitly used rdf:ID to specify that
> the description of a resource has got this ID. 

I don't feel confident that I know this area of the spec particularly well,
however, I think you may be on dodgy ground here.  I don't believe it says
anywhere that an rdf:ID is an XML ID attribute.  If it were, there would be
some ambiguity about what http://example#id denoted.

The semantics of fragment ID's is an issue the WG is still to consider.
Things might be clearer after that.


>In contrast to rdf:ID in my opinion
> rdf:about only specifies that the following description describes the resource identified
> thereby but does not tell that now the description itself has got this ID.
> (I think that when I use rdf:about with an ID (e.g. a urn) somewhere else has to be defined that the
> resource that I describe is identified by this ID)
> Please let me know if my point of view is wrong!
> see our RDF:XML Examples at http://nm.wu-wien.ac.at/universal/metadata
> best Regards
> Thomas Enzi  thomas.enzi@wu-wien.ac.at
> UNIVERSAL, European IST-Project
> Vienna University of Economics and Business Administration,
> Department of  Information Systems - New Media Working Group
> >UNDER DISCUSSION: rdfms-difference-between-ID-and-about
> >The Working Group is considering two proposals:
> >Proposal 1: http://www.w3.org/2000/10/rdf-
> >tests/rdfcore/rdfms-difference-between-ID-and-about/
> >Effectively make rdf:ID and rdf:about equivalent.
> >Proposal 2: No writeup available yet
> >Generate rdfs:isDefinedBy triples when rdf:ID is used.
> >If you have an opinion on this issue, please let us know:
> >       www-rdf-comments@w3.org
> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Thomas Enzi                             Thomas.Enzi@wu-wien.ac.at
> Research Assistant, UNIVERSAL Project
> Vienna University of Economics and Business Administration
> Augasse 2-6, A-1090 Vienna, Austria
> Tel: (+43-1) 31 336 x4417
> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Received on Thursday, 5 July 2001 12:29:04 UTC

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