- From: Steve Pepper <pepper@ontopia.net>
- Date: Thu, 24 Mar 2005 11:17:55 +0100
- To: "Dan Connolly" <connolly@w3.org>
- Cc: "SWBPD list" <public-swbp-wg@w3.org>
* Steve Pepper | | We are talking about the *base* RDF model in which a resource can | only have a single URI as an identifier. * Dan Connolly | | Er... no, that's just not the case. A resource can have any | number of URIs as identifiers. I don't think we disagree (I hope :) but there is clearly an issue of terminology that needs to be sorted out here. I may have this completely wrong and, if so, correct me, but my understanding is as follows: 1) Resources in RDF are represented by nodes 2) A node may have at most one URI reference (some have none) 3) The URI reference of a node is an identifier for the resource represented by the node 4) In the absence of a vocabulary beyond that defined by RDF itself, a resource can thus only have a single identifier. Clearly an RDF graph may contain multiple nodes (with different URIrefs) that are *intended* to represent the same resource, but in the absence of a property such as owl:sameAs, there is no way for an application to know that they do in fact represent the same resource. Am I right so far? | | This has been clarified in the text. | | pointer? http://www.w3.org/2001/sw/BestPractices/RDFTM/survey-2005-03-17.html#identity I guess it could be made even more explicit in the first paragraph that we are talking about the core RDF model and vocabulary. Would that help? Steve -- Steve Pepper <pepper@ontopia.net> Chief Strategy Officer, Ontopia Convenor, ISO/IEC JTC 1/SC 34/WG 3 Editor, XTM (XML Topic Maps 1.0)
Received on Thursday, 24 March 2005 10:23:34 UTC