Hello Jonas, I confirm that this is error in our runtime. I'm sorry but I can't produce a quick fix for it, it will take some time. What's good is that !isBLANK(?resourceUri) is sufficient in this specific case, because non-blank subject can not be something other than URI.
Best Regards, Ivan Mikhailov OpenLink Software http://virtuoso.openlinksw.com On Sun, 2010-06-06 at 17:21 +0200, Jonas Brekle wrote: > Hello, > > i am running Virtuoso 6.1.1 and experience some unexpected behaviour of > a query containing a isUri Filter in combination with 2 triple > patterns. when i query with this: > > SELECT DISTINCT ?resourceUri > FROM <http://purl.org/net/faunistics#> > WHERE { > ?resourceUri <http://purl.org/net/faunistics#recordedAtLocation> > <http://db.caucasus-spiders.info/Place/152> . > ?resourceUri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> > <http://purl.org/net/faunistics#CitedRecord> > FILTER (isURI(?resourceUri) && !isBLANK(?resourceUri)) > } > > on that minimal model: > > <?xml version="1.0" encoding="UTF-8" ?> > <!DOCTYPE ns3:RDF [ > <!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#";> > <!ENTITY dc "http://purl.org/dc/elements/1.1/";> > <!ENTITY ns0 "http://purl.org/net/faunistics#";> > <!ENTITY ns1 "http://www.mindswap.org/2003/owl/geo/geoFeatures.owl#";> > <!ENTITY geo "http://www.w3.org/2003/01/geo/wgs84_pos#";> > <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#";> > <!ENTITY ns2 "http://purl.org/net/faunistics#ObjectProperty/";> > ]> > <ns3:RDF xml:base="&ns0;" > xmlns:rdfs="&rdfs;" > xmlns:dc="&dc;" > xmlns:ns0="&ns0;" > xmlns:ns1="&ns1;" > xmlns:geo="&geo;" > xmlns:xsd="&xsd;" > xmlns:ns2="&ns0;ObjectProperty/" > xmlns:ns3="http://www.w3.org/1999/02/22-rdf-syntax-ns#";> > <ns0:CitedRecord ns3:about="http://db.caucasus-spiders.info/record/10488"; > rdfs:label="10488: Hilaira frigida"> > <ns0:recordedAtLocation > ns3:resource="http://db.caucasus-spiders.info/Place/152"; /> > <ns0:identifiesAs > ns3:resource="http://db.caucasus-spiders.info/species/884"; /> > <ns0:citedIn ns3:resource="http://db.caucasus-spiders.info/Publication/8"; > /> > <ns0:publishedIn > ns3:resource="http://db.caucasus-spiders.info/Publication/79"; /> > </ns0:CitedRecord> > </ns3:RDF> > > the result is empty (which i can not understand intuitively), but if i remove > the isUri-Filter, the result comes > as wanted (but that are all URIs). so why does the isUri filter eliminate > URIs? > Can somebody help me? > > Regards > Jonas Brekle > > > > > ------------------------------------------------------------------------------ > ThinkGeek and WIRED's GeekDad team up for the Ultimate > GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the > lucky parental unit. See the prize list and enter to win: > http://p.sf.net/sfu/thinkgeek-promo > _______________________________________________ > Virtuoso-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/virtuoso-devel
