Kjetil, LIMIT is for WHERE, if CONSTRUCT may create up to two triples per row then the resulting graph is no bigger than 2*4 = 8 triples. (I'm writing "up to two triples per row", not "two triples per row" because in common case there may be unbound variables and/or repeating triples).
In addition, you may wish to abbreviate the query as follows: prefix dct:<http://purl.org/dc/terms/> prefix rdfs:<http://www.w3.org/2000/01/rdf-schema#> CONSTRUCT { ?resource dct:title ?title ; a ?type } FROM <http://msone.computas.no/graphs/inferred/classification> FROM <http://msone.computas.no/graphs> FROM <http://msone.computas.no/graphs/instance/nfi> FROM <http://msone.computas.no/graphs/instance/mo> FROM <http://msone.computas.no/graphs/ontology/mediasone> FROM <http://msone.computas.no/graphs/vocab/mediasone> FROM <http://msone.computas.no/graphs/inferred/nfi/realisation1> FROM <http://msone.computas.no/graphs/inferred/mo/realisation1> FROM <http://msone.computas.no/graphs/inferred/nfi/realisation2> FROM <http://msone.computas.no/graphs/inferred/mo/realisation2> FROM <http://msone.computas.no/graphs/inferred/agent-classification> FROM <http://msone.computas.no/graphs/ontology/mediasone/agent> WHERE { { ?resource a ?type . FILTER (?type = <http://www.w3.org/2002/07/owl#Class> ) . ?resource rdfs:label ?title . } UNION { ?resource a ?type . FILTER (?type in ( <http://musicbrainz.org/mm/mm-2.1#Track> , <http://www.csd.abdn.ac.uk/~ggrimnes/dev/imdb/IMDB#Movie> , <http://xmlns.com/foaf/0.1/Image> , <http://www.computas.com/mediasone#Text> ) ) . ?resource dct:title ?title . } FILTER regex(?title, "turi", "i") } ORDER BY ?title LIMIT 4 OFFSET 0 Best Regards, Ivan Mikhailov OpenLink Software http://virtuoso.openlinksw.com On Fri, 2009-02-20 at 16:41 +0100, Kjetil Kjernsmo wrote: > All, > > I have the following query, which is a rather complex one. The weird thing > about it is that I have a LIMIT 4 at the end, but it still gives 6 solutions. > I'm a bit uncertain about how LIMIT should work, but to me this looks wrong. > > > prefix dct:<http://purl.org/dc/terms/> > prefix rdfs:<http://www.w3.org/2000/01/rdf-schema#> > > CONSTRUCT { ?resource dct:title ?title ; > a ?type } > > FROM <http://msone.computas.no/graphs/inferred/classification> > FROM <http://msone.computas.no/graphs> > FROM <http://msone.computas.no/graphs/instance/nfi> > FROM <http://msone.computas.no/graphs/instance/mo> > FROM <http://msone.computas.no/graphs/ontology/mediasone> > FROM <http://msone.computas.no/graphs/vocab/mediasone> > FROM <http://msone.computas.no/graphs/inferred/nfi/realisation1> > FROM <http://msone.computas.no/graphs/inferred/mo/realisation1> > FROM <http://msone.computas.no/graphs/inferred/nfi/realisation2> > FROM <http://msone.computas.no/graphs/inferred/mo/realisation2> > FROM <http://msone.computas.no/graphs/inferred/agent-classification> > FROM <http://msone.computas.no/graphs/ontology/mediasone/agent> > > WHERE { > { > ?resource a ?type . > FILTER (?type = <http://www.w3.org/2002/07/owl#Class> ) . > ?resource rdfs:label ?title . > } UNION { > ?resource a ?type . > FILTER (?type = <http://musicbrainz.org/mm/mm-2.1#Track> ) . > ?resource dct:title ?title . > } UNION { > ?resource a ?type . > FILTER (?type = > <http://www.csd.abdn.ac.uk/~ggrimnes/dev/imdb/IMDB#Movie> ). > ?resource dct:title ?title . > } UNION { > ?resource a ?type . > FILTER (?type = <http://xmlns.com/foaf/0.1/Image> ) . > ?resource dct:title ?title . > } UNION { > ?resource a ?type . > FILTER (?type = <http://www.computas.com/mediasone#Text> ) . > ?resource dct:title ?title . > } > FILTER regex(?title, "turi", "i") > } > ORDER BY ?title LIMIT 4 OFFSET 0 > > The query can be run at this endpoint: > http://msoneutv.computas.no:8890/sparql > > Can anyone explain why this happens? > > Kind regards > > Kjetil Kjernsmo
