- From: Patrick van Kleef <pkleef@openlinksw.com>
- Date: Mon, 27 Sep 2010 11:59:02 +0200
- To: Christophe Guéret <cgueret@few.vu.nl>
- Cc: Linked Data community <public-lod@w3.org>
Hi Christophe,
> There seems to be an issue with the SPARQL end point of DBPedia, http://dbpedia.org/sparql
> .
>
> When I run this first query:
> SELECT ?result WHERE {<http://dbpedia.org/resource/WVNS-DT2> <http://dbpedia.org/ontology/formationDate
> > ?result. }
> I get the following result telling me that ?result is a date:
> <sparql xmlns="http://www.w3.org/2005/sparql-results#" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance
> " xsi:schemaLocation="http://www.w3.org/2001/sw/DataAccess/rf1/result2.xsd
> ">
> <head>
> <variable name="result"/>
> </head>
> <results distinct="false" ordered="true">
> <result>
> <binding name="result"><literal datatype="http://www.w3.org/2001/XMLSchema#date
> ">2006-09-13</literal></binding>
> </result>
> </results>
> </sparql>
>
> But when I want to find a resource which matches that specific date,
> no result are returned:
> SELECT ?result WHERE { ?result <http://dbpedia.org/ontology/formationDate
> > "2006-09-13"^^<http://www.w3.org/2001/XMLSchema#date>. }
> gives
> <sparql xmlns="http://www.w3.org/2005/sparql-results#" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance
> " xsi:schemaLocation="http://www.w3.org/2001/sw/DataAccess/rf1/result2.xsd
> ">
> <head>
> <variable name="result"/>
> </head>
> <results distinct="false" ordered="true">
> </results>
> </sparql>
>
> Could this be a bug of some sort? I also tried to run the same
> couple of queries on http://lod.openlinksw.com/sparql and everything
> works fine there.
We will investigate this and report back to the list.
Patrick
Received on Monday, 27 September 2010 10:00:20 UTC