- From: Dan Connolly <connolly@w3.org>
- Date: Tue, 10 Jun 2003 20:25:03 -0500
- To: Fabien.Gandon@cs.cmu.edu
- Cc: public-webont-comments@w3.org
- Fabien Gandon - wrote:
>
> I have a problem with PET
Umm... I don't think I'm familiar with PET. What is it?
> of sections 7.1.5 and 7.1.6 of OWL test cases:
> In section 7.1.5 for instance the assertion is:
>
> <rdf:RDF
> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
> xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
> xmlns:owl="http://www.w3.org/2002/07/owl#"
>
> xmlns:first="http://www.w3.org/2002/03owlt/SymmetricProperty/premises001#"
>
> xmlns:second="http://www.w3.org/2002/03owlt/SymmetricProperty/conclusions001#"
>
> xml:base="http://www.w3.org/2002/03owlt/SymmetricProperty/premises001" >
> <rdf:Description rdf:about="premises001#Ghent">
> <first:path rdf:resource="premises001#Antwerp"/>
> </rdf:Description>
> <owl:SymmetricProperty rdf:about="premises001#path"/>
> </rdf:RDF>
>
> besides the fact that the namespace 'second' is not used, you have
> "premises001#" in the IDs and "premises001" in the base therefore my
> implementation fails on this test because "first:path" is expanded as
> "http://www.w3.org/2002/03owlt/SymmetricProperty/premises001#path"
> while "rdf:about='premises001#path'" is expanded as
> "http://www.w3.org/2002/03owlt/SymmetricProperty/premises001#premises001#path".
>
> Any comments ?
They should both expand to
"http://www.w3.org/2002/03owlt/SymmetricProperty/premises001#path"
The use of rdf:about in OWL comes from lower level specifications: RDF,
XML, URI.
In particular:
[[[
4.1.1. Syntactic Conformance
An OWL Full document is any RDF/XML document
<http://www.w3.org/2001/sw/RDFCore/TR/WD-rdf-syntax-grammar-20030117/>
]]] -- http://www.w3.org/TR/owl-test/#docConformance
The rdf:about attribute is introduced in an example...
http://www.w3.org/TR/2003/WD-rdf-syntax-grammar-20030123/#example2
and the specifics of how it works are given in other pars of the
document such as...
[[[
Relative URI References are resolved into RDF URI References
<http://www.w3.org/TR/rdf-concepts/#section-Graph-URIref> according to
the algorithm specified in XML Base
<http://www.w3.org/TR/2001/REC-xmlbase-20010627/> [XML-BASE]
<http://www.w3.org/TR/2002/WD-rdf-syntax-grammar-20021108/#ref-xml-base>
(and RFC 2396).
]]] --
5.3 Base URIs
http://www.w3.org/TR/2002/WD-rdf-syntax-grammar-20021108/#section-baseURIs
Please let us know if this clarifies the situation to your satisfaction.
>
> Regards,
>
> Fabien
--
Dan Connolly, W3C http://www.w3.org/People/Connolly/
Received on Tuesday, 10 June 2003 21:52:15 UTC