Hi Julien, We are looking into this issue and shall report back on our findings ...
Best Regards Hugh Williams Professional Services OpenLink Software, Inc. // http://www.openlinksw.com/ 10 Burlington Mall Road, Suite 265, Burlington MA 01803 Weblog -- http://www.openlinksw.com/blogs/ LinkedIn -- http://www.linkedin.com/company/openlink-software/ Twitter -- http://twitter.com/OpenLink Google+ -- http://plus.google.com/100570109519069333827/ Facebook -- http://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers On 12 Jun 2012, at 13:31, Julien Cojan wrote: > Hi all, > > I noticed two kind of unexpected results when using filters. > For both, I have examples from dbpedia.org sparql endpoint, but I got the > same kind of results from a virtuoso 6.1.5 running on my machine. > > > The first issue is about language tags that are sometimes missing. > For instance with the following query, there is no xml:lang="fr" in the XML > result, nor a "@fr" in the html display. > However, if the second condition in the filter is uncommented, the tag > reappears! > > select * > where{ > <http://dbpedia.org/resource/Augustus> rdfs:label ?n > filter ( > ((?n = 'Auguste'@fr) > #|| (?n = 'Auguste'@fr) > )) > } > > > The second issue seems to be related to the way datatypes are handled. > The http://dbpedia.org/data/Berlin.ntriples contains these two triples among > others: > <http://dbpedia.org/resource/Berlin> > <http://dbpedia.org/ontology/elevation> > "34.0"^^<http://www.w3.org/2001/XMLSchema#double> > <http://dbpedia.org/resource/Berlin> > <http://dbpedia.org/property/elevation> > "34"^^<http://www.w3.org/2001/XMLSchema#int> > > With the following query, I actually get these two results, although both > values are casted to integers > (the xml output contains the attribute > datatype="http://www.w3.org/2001/XMLSchema#integer"; for both). > > When the second condition in the filter is uncommented, only the first > results is returned. > > select * > where { > <http://dbpedia.org/resource/Berlin> ?r ?n > filter ( > ?n=34 > #|| ?n=""@en > ) > } > > > Regards, > Julien Cojan > > > De: "Pablo Mendes" <[email protected]> > À: "Julien Cojan" <[email protected]> > Cc: [email protected] > Envoyé: Samedi 2 Juin 2012 19:39:58 > Objet: Re: [Dbpedia-developers] bug > > Hi Julien, > It does not seem to be a problem with XML only. I also see it in the HTML > output. Looks like you should report to the VOS mailing list: > http://sourceforge.net/mailarchive/forum.php?forum_name=virtuoso-users > > The query below also returns @fr > > select * > where{ > <http://dbpedia.org/resource/Augustus> rdfs:label ?n > filter ( > ((?n = 'Auguste'@fr) > || (?n = 'Augustin'@fr)) > ) > } > > And this other fails: > > select * > where{ > <http://dbpedia.org/resource/Augustus> rdfs:label ?n > filter ( > (?n = 'Auguste'@fr) > ) > } > > Cheers, > Pablo > > On Fri, Jun 1, 2012 at 6:47 PM, Julien Cojan <[email protected]> wrote: > Hi all, > > While trying some queries on dbpedia I noticed a strange behavior of the XML > output with string litterals. > I believe this is a bug of Virtuoso, should I report this on some other > mailing list ? > > For instance on dbpedia.org, with the first request > select * > where{ > ?x rdfs:label ?n > filter ( > ((?x = <http://dbpedia.org/resource/Augustus>) && (?n = 'Auguste'@fr)) > ) > } > there is no lang attribute on the litteral node <binding > name="n"><literal>Auguste</literal></binding> > > Whereas if a second condition is added : > select * > where{ > ?x rdfs:label ?n > filter ( > ((?x = <http://dbpedia.org/resource/Augustus>) && (?n = 'Auguste'@fr)) > ||((?x = <http://dbpedia.org/resource/Augustin>) && (?n = 'Augustin'@fr)) > ) > } > The attribute lang appears : <binding name="n"><literal > xml:lang="fr">Auguste</literal></binding> > > > Cheers, > Julien > > > > De: "Olivier Corby" <[email protected]> > À: "julien cojan" <[email protected]> > Envoyé: Mercredi 23 Mai 2012 11:41:06 > Objet: bug > > > select * > where > { > > service <http://dbpedia.org/sparql> { > {?x rdfs:label ?n . } > filter ( > #((?x = <http://dbpedia.org/resource/Augustin>) && (?n = 'Augustin'@fr)) > #|| > ((?x = <http://dbpedia.org/resource/Augustus>) && (?n = 'Auguste'@fr)) > ) > } > > } > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Dbpedia-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/dbpedia-developers > > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/_______________________________________________ > Virtuoso-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/virtuoso-users
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