Hi,
Thank you for letting me know the more powerful sparql endpoint. The query
works now.
Thanks,
Lushan
On Sun, Oct 23, 2011 at 4:49 PM, Kingsley Idehen <[email protected]>wrote:
> **
> On 10/23/11 12:14 PM, Lushan Han wrote:
>
> Hi,
>
> I have been trying to run the following sparql query on
> http://dbpedia.org/sparql but failed to get any result. Could someone tell
> me why?
>
> PREFIX dbo: <http://dbpedia.org/ontology/>
>
> SELECT DISTINCT ?x, ?z, ?y WHERE {
> ?z a dbo:Organisation .
> ?y a dbo:RadioStation .
> ?0 rdfs:label ?label0 .
> ?label0 bif:contains '"Louisiana"' .
> ?x dbo:state ?0 .
> ?y dbo:city ?x .
> ?y dbo:owner ?z .
> }
>
> Instead, if I don't use the bif:contains function, the query works, as
> shown below
>
> PREFIX dbo: <http://dbpedia.org/ontology/>
> PREFIX db: <http://dbpedia.org/resource/>
>
> SELECT DISTINCT ?x, ?z, ?y WHERE {
> ?z a dbo:Organisation .
> ?y a dbo:RadioStation .
> ?x dbo:state db:Louisiana .
> ?y dbo:city ?x .
> ?y dbo:owner ?z .
> }
>
> However, it seems the bif:contains works for some other queries.
>
> Many thanks,
> Lushan Han
>
>
> Using the more powerful LOD instance where we also have DBpedia loaded you
> have:
> http://lod.openlinksw.com/sparql?default-graph-uri=&query=PREFIX+dbo%3A+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2F%3E%0D%0A%0D%0ASELECT+DISTINCT+%3Fx%2C+%3Fz%2C+%3Fy+WHERE+%7B%0D%0A++%3Fz+a+dbo%3AOrganisation+.%0D%0A++%3Fy+a+dbo%3ARadioStation+.%0D%0A++%3F0+rdfs%3Alabel+%3Flabel0+.%0D%0A++%3Flabel0+bif%3Acontains+%27%22Louisiana%22%27+.%0D%0A++%3Fx+dbo%3Astate+%3F0+.%0D%0A+
> +%3Fy+dbo%3Acity+%3Fx+.%0D%0A++%3Fy+dbo%3Aowner+%3Fz+.%0D%0A%7D&should-sponge=&format=text%2Fhtml&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=15000&debug=on<http://lod.openlinksw.com/sparql?default-graph-uri=&query=PREFIX+dbo%3A+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2F%3E%0D%0A%0D%0ASELECT+DISTINCT+%3Fx%2C+%3Fz%2C+%3Fy+WHERE+%7B%0D%0A++%3Fz+a+dbo%3AOrganisation+.%0D%0A++%3Fy+a+dbo%3ARadioStation+.%0D%0A++%3F0+rdfs%3Alabel+%3Flabel0+.%0D%0A++%3Flabel0+bif%3Acontains+%27%22Louisiana%22%27+.%0D%0A++%3Fx+dbo%3Astate+%3F0+.%0D%0A++%3Fy+dbo%3Acity+%3Fx+.%0D%0A++%3Fy+dbo%3Aowner+%3Fz+.%0D%0A%7D&should-sponge=&format=text%2Fhtml&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=15000&debug=on>
>
> I believe you query is timing out since it is quite expensive.
>
> We provide the LOD Cloud cache instance (an 8-node cluster) for heavier
> duty queries against DBpedia and many other datasets from the LOD Cloud.
>
>
> Kingsley
>
>
>
> ------------------------------------------------------------------------------
> The demand for IT networking professionals continues to grow, and the
> demand for specialized networking skills is growing even more rapidly.
> Take a complimentary Learning@Cisco Self-Assessment and learn
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>
>
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>
>
>
> --
>
> Regards,
>
> Kingsley Idehen
> President & CEO
> OpenLink Software
> Web: http://www.openlinksw.com
> Weblog: http://www.openlinksw.com/blog/~kidehen
> Twitter/Identi.ca: kidehen
>
>
>
>
>
>
>
> ------------------------------------------------------------------------------
> The demand for IT networking professionals continues to grow, and the
> demand for specialized networking skills is growing even more rapidly.
> Take a complimentary Learning@Cisco Self-Assessment and learn
> about Cisco certifications, training, and career opportunities.
> http://p.sf.net/sfu/cisco-dev2dev
> _______________________________________________
> Dbpedia-discussion mailing list
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> https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
>
>
------------------------------------------------------------------------------
The demand for IT networking professionals continues to grow, and the
demand for specialized networking skills is growing even more rapidly.
Take a complimentary Learning@Cisco Self-Assessment and learn
about Cisco certifications, training, and career opportunities.
http://p.sf.net/sfu/cisco-dev2dev
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