- From: Eric Prud'hommeaux <eric@w3.org>
- Date: Sat, 25 May 2013 08:09:28 -0400
- To: Bernard Vatant <bernard.vatant@mondeca.com>
- Cc: Semantic Web <semantic-web@w3.org>
* Bernard Vatant <bernard.vatant@mondeca.com> [2013-05-24 19:32+0200]
> Hi all
>
> Parsing some vocabularies in the cloud, we stumbled on syntactic
> constructions such as the following one from http://lexvo.org/ontology
>
> <owl:SymmetricProperty rdf:about="#nearlySameAs">
> ...
> <lvont:somewhatSameAs rdf:resource="owl:sameAs" />
> </owl:SymmetricProperty>
>
> Let alone discussions on the semantics, is such use of "owl:sameAs" as
> value of rdf:resource valid RDF-XML? a good practice?
> The W3C validator seems happy with it, but some parsers won't, asking for a
> valid (relative or absolute) URI in this position, not a CURIE.
Pasting
[[
<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:lvont="http://lexvo.org/ontology#"
xmlns:owl="http://www.w3.org/2002/07/owl#">
<owl:SymmetricProperty rdf:about="#nearlySameAs">
<lvont:somewhatSameAs rdf:resource="owl:sameAs" />
</owl:SymmetricProperty>
</rdf:RDF>
]]
into the RDF validator gives you these triples:
Number Subject Predicate Object
1 http://www.w3.org/RDF/Validator/run/1369483622857#nearlySameAs http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://www.w3.org/2002/07/owl#SymmetricProperty
2 http://www.w3.org/RDF/Validator/run/1369483622857#nearlySameAs http://lexvo.org/ontology#somewhatSameAs owl:sameAs
Note that the Object of #2 is <owl:sameAs>, which appears to RDF to be
a URI scheme called "owl".
The validator couldn't detect this as an error because it can't know
that there is no owl: URI scheme. It certainly is an error because
what you really want for the Object is
<http://www.w3.org/2002/07/owl#sameAs>.
> Thoughts?
>
>
> --
> *Bernard Vatant
> *
> Vocabularies & Data Engineering
> Tel : + 33 (0)9 71 48 84 59
> Skype : bernard.vatant
> Blog : the wheel and the hub <http://bvatant.blogspot.com>
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--
-ericP
Received on Saturday, 25 May 2013 12:09:57 UTC