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Re: Paradoxical SPARQL query?

From: Kendall Clark <kendall@monkeyfist.com>
Date: Wed, 7 Jun 2006 12:00:34 -0400
Message-Id: <F675FB09-84DA-40A4-9B24-B74D62A1EDC2@monkeyfist.com>
Cc: public-rdf-dawg-comments@w3.org
To: Martin Soto <soto@informatik.uni-kl.de>


On May 23, 2006, at 5:36 AM, Martin Soto wrote:

>
> Hello everyone!
>
> Trying to understand the latest draft SPARQL specification,  I arrived
> at the following query, which, as far as I can see, expresses a  
> paradox:
>
>         PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
>         PREFIX foaf: <http://xmlns.com/foaf/0.1/>
>
>         SELECT DISTINCT ?p ?n ?h
>         WHERE { ?p rdf:type foaf:Person .
>                 OPTIONAL {?p foaf:name ?n .
>                           FILTER ( !bound(?h) ) }
>                 OPTIONAL {?p foaf:homepage ?h .
>                           FILTER ( !bound(?n) ) }
>         }

Martin,

Thanks for your comments. The DAWG is thinking about them and will  
get back to you with a response in due course.

Cheers,
Kendall Clark
Received on Wednesday, 7 June 2006 16:01:04 GMT

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