On 10/25/13 2:28 PM, Julien Plu wrote:
The query works on a Virtuoso 6 yes : http://fr.dbpedia.org/sparql?default-graph-uri=&query=select+distinct+count%28%3Fbirth%29+count%28%3Fdeath%29%0D%0Awhere+%7B++++++++++++++%0D%0A++++%3Fentity+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2FbirthDate%3E+%3Fbirth+.+++++%0D%0A++++filter%28datatype%28%3Fbirth%29+%3D+xsd%3Adate%29.%0D%0A++++OPTIONAL+%7B%3Fentity+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2FdeathDate%3E+%3Fdeath+.%0D%0A++++++++++++filter%28datatype%28%3Fdeath%29+%3D+xsd%3Adate%29.%0D%0A++++%7D%0D%0A%7D&format=text%2Fhtml&timeout=0&debug=onAnd even this query :prefix xsd: <http://www.w3.org/2001/XMLSchema#> <http://www.w3.org/2001/XMLSchema#>select distinct count(?birth) count(?death) where { ?entity <http://dbpedia.org/ontology/birthDate> ?birth . filter(datatype(?birth) = xsd:date). OPTIONAL {?entity <http://dbpedia.org/ontology/deathDate> ?death . filter(datatype(?death) = xsd:date). } } Doesn't works. You can try it here : http://data.lirmm.fr:8890/sparql/ Best. Julien.
Okay, this is a bug in V7 (or at least the release you are using since the LOD instance is actually V7 too).
Kingsley
2013/10/25 Kingsley Idehen <kide...@openlinksw.com <mailto:kide...@openlinksw.com>>On 10/25/13 11:35 AM, Julien Plu wrote:select distinct count(?birth) count(?death) where { ?entity <http://dbpedia.org/ontology/birthDate> ?birth . filter(datatype(?birth) = xsd:date). OPTIONAL {?entity <http://dbpedia.org/ontology/deathDate> ?death . filter(datatype(?death) = xsd:date). } } And this query return the good results : select distinct count(?birth) count(?death) where { ?entity <http://dbpedia.org/ontology/birthDate> ?birth . filter(datatype(?birth) = "http://www.w3.org/2001/XMLSchema#date <http://www.w3.org/2001/XMLSchema#string>"). OPTIONAL {?entity <http://dbpedia.org/ontology/deathDate> ?death . filter(datatype(?death) = "http://www.w3.org/2001/XMLSchema#date <http://www.w3.org/2001/XMLSchema#string>"). } } Have-I missed something or is-it really a bug from Virtuoso 7 ?It's a bug if you don't have this issue when using Virtuoso 6. That said, I would expect the following to work: prefix xsd: <http://www.w3.org/2001/XMLSchema#> <http://www.w3.org/2001/XMLSchema#> select distinct count(?birth) count(?death) where { ?entity <http://dbpedia.org/ontology/birthDate> ?birth . filter(datatype(?birth) = xsd:date). OPTIONAL {?entity <http://dbpedia.org/ontology/deathDate> ?death . filter(datatype(?death) = xsd:date). } } Proof: 1. http://kingsley.idehen.net/c/DBYF6E -- query against LOD Cloud Cache .--Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web:http://www.openlinksw.com Personal Weblog:http://www.openlinksw.com/blog/~kidehen <http://www.openlinksw.com/blog/%7Ekidehen> Twitter/Identi.ca handle: @kidehen Google+ Profile:https://plus.google.com/112399767740508618350/about LinkedIn Profile:http://www.linkedin.com/in/kidehen ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.clktrk _______________________________________________ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users
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