- From: patrick hayes <phayes@ai.uwf.edu>
- Date: Tue, 28 May 2002 18:04:09 -0500
- To: Dan Brickley <danbri@w3.org>
- Cc: w3c-rdfcore-wg@w3.org
>On Fri, 24 May 2002, Dave Beckett wrote: > >> >>>Jeremy Carroll said: >> > Second a few questions. >> > >> > 1. Are there unattached nodes in an RDF graph? >> >> No; since we base our describe the rdf graph as triples >> as node->arc->node rather than any other form. If this is not the >> case then N-Triples in insufficient to connect the model theory and >> syntax. >> >> > 2. Can any URI ref be a property name or must there be some associated >> > namespace? >> >> Any URI ref. > >No, not _any_ URI ref. > >Some URI refs don't name properties. Well, then any assertion made using them as property names will be false; but still, its not meaningless, so I think we should allow it. There might be some reason for someone to treat a phone number as a property; its not totally crazy. In general, I don't think we are in a position to say that something definitely does not name a property. Pat > >Arguably, all the phone: ones, all the mailto: ones, and a huge % of all >the http:// URIrefs too. > >But I think I agree with (what I take to be) your general point. There are >many URIrefs that we can take as naming URIrefs which aren't (for various >reasons) going to have an RDF/XML document derferencable. > >However, the fact that they name RDF properties means that they can be >used in RDF/XML instance data using the XML namespace mechanism, so in >that sense they are associated with a namespace. Or they are a namespace. >Or they can be written about using XML namespaces. > > This is pretty clear from M&S and we've mentioned this >> a few times in passing with respect to the issues related to >> writing them as qnames. >> >> (XML) Namespaces are artifacts of the RDF/XML serialization and are >> not in the current model. > > >Dan > > >-- >mailto:danbri@w3.org >http://www.w3.org/People/DanBri/ -- --------------------------------------------------------------------- IHMC (850)434 8903 home 40 South Alcaniz St. (850)202 4416 office Pensacola, FL 32501 (850)202 4440 fax phayes@ai.uwf.edu http://www.coginst.uwf.edu/~phayes
Received on Tuesday, 28 May 2002 19:03:28 UTC