- From: Nikita Ogievetsky <nogievet@cogx.com>
- Date: Mon, 25 Nov 2002 19:23:26 -0800
- To: "Patrick Stickler" <patrick.stickler@nokia.com>, "Paul Prescod" <paul@prescod.net>, "Richard H. McCullough" <rhm@cdepot.net>, "Alexander Jerusalem" <ajeru@vknn.org>
- Cc: "Doug Ransom" <doug.ransom@alumni.uvic.ca>, <www-rdf-interest@w3.org>
Patric, Sorry, I do not see how I left out something? As Alexander noted, there is no semantics in the value of an id attribute. So an assertion: <rdf:Description rdf:ID="askdhjgal"> <rtm:indicatedBy rdf:resource="http://www.w3c.org"/> </rdf:Description> is not different from: <rdf:Description rdf:ID="dfngdfng"> <rtm:indicatedBy rdf:resource="http://www.w3c.org"/> </rdf:Description> Actually, from topic maps point of view in this case subjects of these two assertions are identical and are subject to merging. Or may be I had missed your point? --Nikita > [Patrick Stickler, Nokia/Finland, (+358 40) 801 9690, patrick.stickler@nokia.com] > > > > From: "ext Nikita Ogievetsky" <nogievet@cogx.com> > > > > Alexander, > > > > This is actually one of the axioms of Topic Maps [1]. > > In my RDF Topic Maps attempts [2] I am defining two RTM properties: > > > > <daml:UnumbiguousProperty rdf:ID="indicatedBy"> > > <rdfs:subPropertyOf > > rdf:resource="http://www.daml.org/2001/03/daml+oil#TransitiveProperty"/> > > <rdfs:domain rdf:resource="#topic"/> > > <rdfs:range rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/> > > <rdfs:comment>Subject Indicating Resource</rdfs:comment> > > </daml:UnumbiguousProperty> > > > > <daml:UnumbiguousProperty rdf:ID="constitutedBy"> > > <rdfs:domain rdf:resource="#topic"/> > > <rdfs:range rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/> > > <rdfs:comment>Subject Constituting Resource</rdfs:comment> > > </daml:UnumbiguousProperty> > > > > So that I can say in one document: > > > > <rdf:Description rdf:ID="w3c"> > > <rtm:indicatedBy rdf:resource="http://www.w3c.org"/> > > </rdf:Description> > > <rdf:Description rdf:ID="w3cwebsite"> > > <rtm:constitutedBy rdf:resource="http://www.w3c.org"/> > > </rdf:Description> > > The problem here is that you've left out a valid assertion, > which shows why you can't escape the ambiguity even with > such specialized properties. I.e. > > <rdf:Description rdf:ID="w3cwebsite"> > <rtm:indicatedBy rdf:resource="http://www.w3c.org"/> > </rdf:Description> > > Even though it is fair to presume that one would not say > > <rdf:Description rdf:ID="w3c"> > <rtm:constitutedBy rdf:resource="http://www.w3c.org"/> > </rdf:Description> > --Nikita.
Received on Monday, 25 November 2002 22:24:02 UTC