- From: John Cowan <jcowan@reutershealth.com>
- Date: Thu, 07 Sep 2000 12:31:35 -0400
- To: Miles Sabin <msabin@cromwellmedia.co.uk>, "xml-uri@w3.org" <xml-uri@w3.org>
Miles Sabin wrote: > But Simon, that's a pretty tall order, because there's no > end to the number of distinct resources a URL (nb. UR*L*) might > locate. Or distinct entity bodies, anyhow. Actually, it's a many-to-many situation: a single URL can return many different entity bodies (time-sensitive, content negotiation, etc.); two different URLs may return the same entity body. Officially, every distinct URL represents a distinct resource. (Absolute and corresponding relative URLs are not distinct URLs in this sense.) My personal view is that whether two distinct URLs represent one or two resources depends on the owner(s) of the resource(s), who can use RDF to publish an equivalence relation. The situation with URNs is no different. The paradigm case of URNs is ISBNs, and it's up to the publisher whether a new edition merits a new ISBN or not. A single URN is definitely not bound to a single entity body. -- There is / one art || John Cowan <jcowan@reutershealth.com> no more / no less || http://www.reutershealth.com to do / all things || http://www.ccil.org/~cowan with art- / lessness \\ -- Piet Hein
Received on Thursday, 7 September 2000 12:31:36 UTC