Hi Jens, We are already looking into this issue and shall report back when we have an update/fix ...
Best Regards Hugh Williams Professional Services OpenLink Software Web: http://www.openlinksw.com Support: http://support.openlinksw.com Forums: http://boards.openlinksw.com/support Twitter: http://twitter.com/OpenLink On 13 Oct 2010, at 10:45, Jens Lehmann wrote: > > Hello, > > On 11.10.2010 13:09, Jens Lehmann wrote: >> >> Hello, >> >> using the official DBpedia endpoint (http://dbpedia.org/sparql), I get >> missing results on this CONSTRUCT query: >> >> CONSTRUCT {<http://dbpedia.org/resource/Leipzig> ?p0 ?o0 . >> ?o0 ?p1 ?o1 .} >> WHERE {<http://dbpedia.org/resource/Leipzig> ?p0 ?o0 . >> OPTIONAL { ?o0 ?p1 ?o1 . } } >> ORDER BY ?p0 ?o0 ?p1 ?o1 >> >> For instance, it does not contain a "populationTotal" triple. The >> following simpler query contains this triple: >> >> CONSTRUCT {<http://dbpedia.org/resource/Leipzig> ?p0 ?o0 .} >> WHERE {<http://dbpedia.org/resource/Leipzig> ?p0 ?o0 . } >> ORDER BY ?p0 ?o0 >> >> I thought this could be related to anytime queries, but then it's not >> such a hard query (one join and "Leipzig" is a fixed resource). > > Kingsley suggested me to try the same on > http://lod.openlinksw.com/sparql for shortening the problem discovery > process. The result is the same, e.g. "populationTotal" is missing from > the 2nd query result. > > Here are the queries as links for your convenience: > > http://lod.openlinksw.com/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&should-sponge=&query=CONSTRUCT+{+%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FLeipzig%3E+%3Fp0+%3Fo0+.}%0D%0AWHERE+{+%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FLeipzig%3E+%3Fp0++%3Fo0+.+}%0D%0AORDER+BY+%3Fp0+%3Fo0%0D%0A%0D%0A&format=text%2Fplain&debug=on&timeout= > > http://lod.openlinksw.com/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&should-sponge=&query=CONSTRUCT+{+%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FLeipzig%3E+%3Fp0+%3Fo0+.%0D%0A++++++++++++%3Fo0+%3Fp1+%3Fo1+.}%0D%0AWHERE+{+%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FLeipzig%3E+%3Fp0++%3Fo0+.%0D%0A+++++++++OPTIONAL+{+%3Fo0+++++++%3Fp1++%3Fo1+.+}+}%0D%0AORDER+BY+%3Fp0+%3Fo0+%3Fp1+%3Fo1%0D%0A&format=text%2Fplain&debug=on&timeout= > > Unless I am misunderstanding something, this looks like a serious bug. > (It also happens on our local Virtuoso installations.) > > Kind regards, > > Jens > > -- > Dipl. Inf. Jens Lehmann > Department of Computer Science, University of Leipzig > Homepage: http://www.jens-lehmann.org > GPG Key: http://jens-lehmann.org/jens_lehmann.asc > > ------------------------------------------------------------------------------ > Beautiful is writing same markup. Internet Explorer 9 supports > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. > Spend less time writing and rewriting code and more time creating great > experiences on the web. Be a part of the beta today. > http://p.sf.net/sfu/beautyoftheweb > _______________________________________________ > Virtuoso-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/virtuoso-users
