On 10/28/11 1:11 PM, Lushan Han wrote:
Hi Kingsley,It is nice to know that a powerful endpoint is provided for LOD cloud. And I would like to know what other datasets are included and the total size of data in the endpoint.
Most of the LOD Cloud datasets. Basically, the ones that are available in downloadable form i.e., RDF dumps. We are only missing those that are SPARQL endpoint only or those that we are totally unaware of etc..
Kingsley
Thanks LushanOn Sun, Oct 23, 2011 at 4:49 PM, Kingsley Idehen <kide...@openlinksw.com <mailto:kide...@openlinksw.com>> 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 HanUsing 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 about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ Dbpedia-discussion mailing list Dbpedia-discussion@lists.sourceforge.net <mailto:Dbpedia-discussion@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion--Regards, Kingsley Idehen President& CEO OpenLink Software Web:http://www.openlinksw.com Weblog:http://www.openlinksw.com/blog/~kidehen <http://www.openlinksw.com/blog/%7Ekidehen> 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 Dbpedia-discussion@lists.sourceforge.net <mailto:Dbpedia-discussion@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
-- Regards, Kingsley Idehen President& CEO OpenLink Software Company Web: http://www.openlinksw.com Personal Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca handle: kidehen Google+ Profile: https://plus.google.com/112399767740508618350/about LinkedIn Profile: http://www.linkedin.com/in/kidehen
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------------------------------------------------------------------------------ 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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