- From: Graham Klyne <GK@ninebynine.org>
- Date: Fri, 10 Jun 2005 10:38:30 +0100
- To: Andrea Splendiani <andrea.splendiani@unimib.it>, semantic-web@w3.org
At 02:38 10/06/05 +0200, Andrea Splendiani wrote: >Citing >from: <http://www.w3.org/TR/owl-guide/>http://www.w3.org/TR/owl-guide/ > > >I get the following namespace declaration: > ><rdf:RDF > xmlns > ="<http://www.w3.org/TR/2004/REC-owl-guide-20040210/wine#>http://www.w3.org/TR/2004/REC-owl-guide-20040210/wine#" > > xmlns:vin > ="<http://www.w3.org/TR/2004/REC-owl-guide-20040210/wine#>http://www.w3.org/TR/2004/REC-owl-guide-20040210/wine#" > > xml:base > ="<http://www.w3.org/TR/2004/REC-owl-guide-20040210/wine#>http://www.w3.org/TR/2004/REC-owl-guide-20040210/wine#" > > >xmlns:food="<http://www.w3.org/TR/2004/REC-owl-guide-20040210/food#>http://www.w3.org/TR/2004/REC-owl-guide-20040210/food#" > > xmlns:owl > ="<http://www.w3.org/2002/07/owl#>http://www.w3.org/2002/07/owl#" > xmlns:rdf > ="<http://www.w3.org/1999/02/22-rdf-syntax-ns#>http://www.w3.org/1999/02/22-rdf-syntax-ns#" > > >xmlns:rdfs="<http://www.w3.org/2000/01/rdf-schema#>http://www.w3.org/2000/01/rdf-schema#" > > xmlns:xsd > ="<http://www.w3.org/2001/XMLSchema#>http://www.w3.org/2001/XMLSchema#"> > >Later in the document internal references are like this: > ><owl:Class rdf:ID="Pasta"> > <rdfs:subClassOf rdf:resource="#EdibleThing" /> > ... ></owl:Class> > >xml:base >="<http://www.w3.org/TR/2004/REC-owl-guide-20040210/wine#>http://www.w3.org/TR/2004/REC-owl-guide-20040210/wine#" > >Why do we have the "#" character ath the end of basename ? Isn't it a >duplicate ? The 'rdf:resource="#EdibleThing"' and base URI are combines using the URI relative URI resolution algorithm (see [1]), so this works just fine. It would also work if the base URI did not have a trailing '#', but there are/may be other reasons why the '#' has been included. #g -- [1] ftp://ftp.rfc-editor.org/in-notes/rfc3986.txt ------------ Graham Klyne For email: http://www.ninebynine.org/#Contact
Received on Friday, 10 June 2005 09:52:44 UTC