- From: Eric Prud'hommeaux <eric@w3.org>
- Date: Thu, 1 Jun 2006 13:59:30 +0200
- To: Richard Newman <r.newman@reading.ac.uk>
- Cc: public-rdf-dawg-comments@w3.org
On Mon, May 08, 2006 at 07:15:22PM -0700, Richard Newman wrote:
>
> Hi all,
> I was just working my way through the SPARQL CR, and noticed a
> slight annoyance in <http://www.w3.org/TR/rdf-sparql-query/#unionOp>.
>
> The example data only specifies titles:
>
> ===================================================
> @prefix dc10: <http://purl.org/dc/elements/1.0/> .
> @prefix dc11: <http://purl.org/dc/elements/1.1/> .
>
> _:a dc10:title "SPARQL Query Language Tutorial" .
>
> _:b dc11:title "SPARQL Protocol Tutorial" .
>
> _:c dc10:title "SPARQL" .
> _:c dc11:title "SPARQL (updated)" .
> ===================================================
>
> but the second query references creators:
>
>
> ===================================================
> PREFIX dc10: <http://purl.org/dc/elements/1.1/>
> PREFIX dc11: <http://purl.org/dc/elements/1.0/>
>
> SELECT ?title ?author
> WHERE { { ?book dc10:title ?title . ?book dc10:creator ?author }
> UNION
> { ?book dc11:title ?title . ?book dc11:creator ?author }
> }
> ===================================================
>
> Running this query against the data in the document will not
> produce the stated results:
>
> author | title
> ====================================================
> "Alice" | "SPARQL Protocol Tutorial"
> ----------------------------------------------------
> "Bob" | "SPARQL Query Language Tutorial"
> ====================================================
>
>
> I suggest adding the triples
>
> _:b dc11:creator "Alice" .
> _:a dc10:creator "Bob" .
>
> to the example data, if only for clarity's sake.
>
> -R
Andy fixed that in the editor's draft 1.677 (see
http://www.w3.org/2001/sw/DataAccess/rq23/#unionOp
http://www.w3.org/2001/sw/DataAccess/rq23/#chlog
and
http://www.w3.org/2001/sw/DataAccess/rq23/examples )
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--
-eric
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Received on Thursday, 1 June 2006 11:57:55 UTC