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Re: ANN: sameas.org

From: Toby Inkster <tai@g5n.co.uk>
Date: Thu, 04 Jun 2009 10:18:09 +0100
To: Richard Cyganiak <richard@cyganiak.de>
Cc: Hugh Glaser <hg@ecs.soton.ac.uk>, Semantic Web <semantic-web@w3.org>, Linked Data community <public-lod@w3.org>, Ian Millard <icm@ecs.soton.ac.uk>
Message-Id: <1244107089.12193.29.camel@ophelia2.g5n.co.uk>
On Thu, 2009-06-04 at 00:54 +0100, Richard Cyganiak wrote:
> The general RDF graph has the shape
>    <U1> owl:sameAs <U1>, <U2>, <U3>, <U4> .

Oh yes, another thing: saying the above, with OWL reasoning in place is
equivalent to saying:

	<U1> owl:sameAs <U1>, <U1>, <U1>, <U1> .

in a way. For this reason, you might want to consider adding in support
for my URI ontology, in which case you'd serve something like this:

@prefix owl : <http://www.w3.org/2002/07/owl#> .
@prefix uri : <http://purl.org/NET/uri#> .

<U1>
  owl:sameAs
    <U1> ,
    <U2> ,
    <U3> ;
  uri:identifier
    [ a uri:UniformResourceIdentifier ; rdf:value "U1" ] ,
    [ a uri:UniformResourceIdentifier ; rdf:value "U2" ] ,
    [ a uri:UniformResourceIdentifier ; rdf:value "U3" ] .

You could even use it to indicate the source of your information. e.g.

<U1>
  uri:identifier
    [
      a uri:UniformResourceIdentifier ;
      rdf:value "U2" ;
      ex:accordingTo <http://..../> , <http://..../> ;
      ex:discoveredByUs "2009-04-05"
    ] .

Harry Halpin's IRW ontology may also be of use, but I've not entirely
been able to figure out how it works. It's here:
<http://www.ontologydesignpatterns.org/ont/web/irw.owl>

-- 
Toby Inkster <tai@g5n.co.uk>
Received on Thursday, 4 June 2009 09:19:19 UTC

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