- From: Jeremy Carroll <jjc@hpl.hp.com>
- Date: Wed, 18 Apr 2007 14:44:59 +0100
- To: semantic-web@w3.org, www-international@w3.org
I am unclear as to what is the correct reading as an RDF graph of a particular representation retrived from the Web. The representation in question is found by GETting http://jena.sf.net/test/iri/redirected this redirects to http://jena.sourceforge.net/test/iri/redirected and then to http://jena.sourceforge.net/test/iri/r%C3%A9sum%C3%A9 which when you apply the URI-to-IRI algorithm of RFC 3987 you get http://jena.sourceforge.net/test/iri/résumé and has content as below. Thus, the graph has one triple, and my uncertainity is about the subject of the triple. In the RDF/XML below the subject is written with the same document reference #r I don't think it is either of these (a) http://jena.sf.net/test/iri/redirected#r (b) http://jena.sourceforge.net/test/iri/redirected#r I think it might be one of these (c) http://jena.sourceforge.net/test/iri/r%C3%A9sum%C3%A9#r (d) http://jena.sourceforge.net/test/iri/résumé#r And while I prefer the latter, I am unclear how to interpret the specs. If my application does a get on http://jena.sourceforge.net/test/iri/résumé then I would expect to see case (d). Equally if an application does a get on http://jena.sourceforge.net/test/iri/r%C3%A9sum%C3%A9 then I would expect case (c), but if the application does a get on (a) or (b), then these cases are ruled out by RFC 3986, and I have to choose between (c) or (d) or something else. Relevant texts ============== RFC 3986 5.1.3. Base URI from the Retrieval URI: [[[ Note that if the retrieval was the result of a redirected request, the last URI used (i.e., that which resulted in the actual retrieval of the document) is the base URI. ]]] http://www.w3.org/TR/rdf-syntax-grammar/#section-baseURIs [[ RDF/XML supports XML Base [XML-BASE] [ ... ] In RDF/XML, a fragment identifier is transformed into a RDF URI reference by appending the fragment identifier to the in-scope base URI. ]] http://www.w3.org/TR/rdf-concepts/#section-Graph-URIref [[ Note: this section anticipates an RFC on Internationalized Resource Identifiers. ]] RFC 3987 [[[ Applications using IRIs as identity tokens with no relationship to a protocol MUST use the Simple String Comparison (see section 5.3.1). ]]] which generally seems relevant to RDF, despite this particular example being protocol based. Content of RDF/XML file ======================= <?xml version='1.0' encoding='UTF-8'?> <rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:rdfs='http://www.w3.org/2000/01/rdf-schema#' > <rdf:Description rdf:about="#r"> <rdfs:comment xml:lang="en">A resource with multiple retrieval URIs and IRIs.</rdfs:comment> </rdf:Description> </rdf:RDF> Jeremy -- Hewlett-Packard Limited registered Office: Cain Road, Bracknell, Berks RG12 1HN Registered No: 690597 England
Received on Wednesday, 18 April 2007 13:45:20 UTC