On 12/6/12 11:00 AM, Vladimir Cvjetkovic wrote:
Does anyone have an idea why the simple query:select distinct ?x where { ... ?x rdfs:domain owl:Thing } returns only 11 items, as in:http://dbpedia.org/isparql/view/?query=PREFIX+rdfs%3A+%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23%3E%0APREFIX+owl%3A+%3Chttp%3A%2F%2Fwww.w3.org%2F2002%2F07%2Fowl%23%3E%0A%0ASELECT+DISTINCT+%3Fx%0AWHERE+%7B%0A++%3Fx+rdfs%3Adomain+owl%3AThing+.+%0A%7D%0A&endpoint=%2Fsparql&maxrows=50&timeout&default-graph-uri=http%3A%2F%2Fdbpedia.org&view=1&amode=0&raw_iris=true <http://dbpedia.org/isparql/view/?query=PREFIX+rdfs:+%3chttp://www.w3.org/2000/01/rdf-schema%23%3e%0aPREFIX+owl:+%3chttp://www.w3.org/2002/07/owl%23%3e%0a%0aSELECT+DISTINCT+?x%0aWHERE+%7b%0a++?x+rdfs:domain+owl:Thing+.+%0a%7d%0a&endpoint=/sparql&maxrows=50&timeout&default-graph-uri=http://dbpedia.org&view=1&amode=0&raw_iris=true>instead of items in:http://mappings.dbpedia.org/server/ontology/classes/owl%3AThing <http://mappings.dbpedia.org/server/ontology/classes/owl:Thing>? Vladimir Cvjetkovic Sent from Windows Mail
Your query: PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX owl: <http://www.w3.org/2002/07/owl#> SELECT DISTINCT ?x WHERE { ?x rdfs:domain owl:Thing . } Implications: Just execute the query without any inference. Ultimately:You still won't get what you seek since the version of Virtuoso in use doesn't support that kind of inference [1]. Also, inference isn't directly accessible via the public SPARQL endpoint per se, due to how it could impact other users on the service.
Links:1. http://virtuoso.openlinksw.com/presentations/SPARQL_Tutorials/SPARQL_Tutorials_Part_5/SPARQL_Tutorials_Part_5.html#(76) -- Inference Rules guide to Virtuoso
-- Regards, Kingsley Idehen Founder & 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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