- From: Graham Klyne <GK@NineByNine.org>
- Date: Fri, 20 Jul 2001 19:06:58 +0100
- To: RDF core WG <w3c-rdfcore-wg@w3.org>
Per today's teleconference, these are the questions that I feel need to be answered to resolve issue #rdfms-identity-anon-resources [1]. 1. Does the current model and syntax spec sanction the use of an anonymous resource to convey anything other than an assertion of the existence of a resource with the properties given? c.f. Frank Manola's comment in [2]. See also Brian McBride's survey of relevant parts of M&S [3]. 2. Does the use of an anonymous resource as a query variable represent an extension to the idea an assertion of the existence of a resource with the properties given? Opinions vary: e.g. [4-9]. 3 If the answer to Q1 is "no" and to Q2 is "yes", should we undertake to extend M&S to allow this usage? If so, why and how? 4. Can we agree whether or not unique generated IDs (in the style of Skolem constants) are equivalent to existentially quantified variables for the purpose of asserting the existence of a resource with properties given? (See Frank's message [10] for a discussion -- I discount the option of dropping anonymous resources.) If we agree they are equivalent: 4.1 What are the advantages and difficulties with each approach? 4.2 Which approach do we prefer? 4.3 How does the preferred approach affect M&S? 5. Are there any other uses of anonymous resources that have been overlooked? #g -- [1] http://www.w3.org/2000/03/rdf-tracking/#rdfms-identity-anon-resources [2] http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jul/0124.html [3] http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jul/0244.html Opinions on representation of query variables: [4] Dan C: http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jun/0435.html [5] Pat H: http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jun/0543.html [6] Pat H: http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jun/0518.html [7] Dan C: http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jun/0537.html [8] Frank: http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jun/0538.html [9] Frank: http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jun/0559.html [10] http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Jul/0218.html ------------ Graham Klyne (GK@ACM.ORG)
Received on Friday, 20 July 2001 14:10:56 UTC