- From: Art Barstow <barstow@w3.org>
- Date: Tue, 22 May 2001 08:40:55 -0400
- To: Brian McBride <bwm@hplb.hpl.hp.com>
- Cc: Dave Beckett <dave.beckett@bristol.ac.uk>, w3c-rdfcore-wg@w3.org
On Mon, May 21, 2001 at 03:11:41PM +0100, Brian McBride wrote: > > Dave Beckett wrote: > > > > > In case #1 (empty element) since rdf:ID points to the target > > resource, adding rdf:resource as well would have two statement > > objects which does not make sense. > > I'm not following you here Dave. > > <rdf:Description> > <foo:bar rdf:ID="rs">foobar</foo:bar> > </rdf:Desscription> > > is clearly legal and the rdf:ID attribute defines the URI of the refied > statement the property represents. My take on Dave's comments in: http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001May/0088.html is that you two agree in this case (non-empty propertyElt) but I should let Dave speak for himself :-). > The question that arises is whether > > <rdf:Description> > <foo:bar rdf:resource="http://foo/" rdf:ID="rs"/> > </rdf:Description> > > is legal, with again the rdf:ID attribute defining the URI of the reifed > statement. It does seem a bit irregular to allow the use of an rdf:ID > attribute to identify the reifed statement in the case where the object > is a literal, but not in the case where it is a resource. And strictly > speaking, the grammar does not rule it out as the rdf:resource attribute > matches the idAboutAttr? I think it does rule this out - see below. > in the production and the rdf:ID attribute > matches the propAttr*. But when a propertElt is empty, idAboutAttr is not part of the grammar: [6.12] propertyElt ::= '<' propName idAttr? '>' value '</' propName '>' | '<' propName idAttr? parseLiteral '>' literal '</' propName '>' | '<' propName idAttr? parseResource '>' propertyElt* '</' propName '>' | '<' propName idRefAttr? bagIdAttr? propAttr* '/>' It seems like the intent of the idRefAttr (in the last option of [6.12]) is to make it illegal for an empty propertyElt to contain both an id and resource attribute. Art ---
Received on Tuesday, 22 May 2001 08:42:01 UTC