- From: Peter F. Patel-Schneider <pfps@research.bell-labs.com>
- Date: Thu, 21 Nov 2002 15:33:39 -0500 (EST)
- To: phayes@ai.uwf.edu
- Cc: w3c-rdfcore-wg@w3.org
From: pat hayes <phayes@ai.uwf.edu> Subject: Re: Comments on RDF Concepts and Abstract Data Model Date: Thu, 21 Nov 2002 14:24:09 -0600 > >From: pat hayes <phayes@ai.uwf.edu> > >Subject: Re: Comments on RDF Concepts and Abstract Data Model > >Date: Wed, 20 Nov 2002 13:14:27 -0600 > > > >> >From: Jeremy Carroll <jjc@hpl.hp.com> > >> >Subject: Re: Comments on RDF Concepts and Abstract Data Model > >> >Date: Mon, 18 Nov 2002 15:59:12 +0100 > >> > > >> >> > >> >> Hi Peter > >> >> > >> >> I am responding to some of your comment > >> >> > >> >> > >>http://lists.w3.org/Archives/Public/www-rdf-comments/2002OctDec/0053.html > >> >> > >> >> in particular: > >> >> > >> >> [[ > >> >> Major comment: > >> >> > >> >> The RDF graph is syntax. As such it makes no sense to define a notion > >> >> of equality over literals, which are pieces of syntax. > >> > >> Peter, why do you say it makes no sense? It makes perfect sense to > >> me. If syntax is character strings, then equality is defined by > >> string equality; if it is some other kind of structure, then equality > >> is defined by other means. But it is still meaningful. > > > >Sure, it is possible to produce an equality relationship on syntax, and one > >can do so without producing contradictions, but what has one achieved? > > Call it 'identity' if you like to avoid the potential confusions with > equality in the language (though I havnt seen much evidence of that > confusion in practice). BUt heres an example of the need to get this > clear: what does it mean to be the same bnode? Its easy to slip past > the need to be clear on this, and this has caused large amounts of > confusion already. Purely syntactic confusion, but confusion all the > same. > > Pat Oh, yes, I agree that this is an area where a clear definition is needed. However, this has nothing to do with literal equality, being much more akin to whether two tokens in the syntax of a programming language refer to the same variable. peter
Received on Thursday, 21 November 2002 15:33:53 UTC