On 9/14/11 1:14 PM, Roberto Mirizzi wrote:
Hi all, can you figure out why the following SPARQL query does not return any results on http://dbpedia.org/sparql, while it does return some results on http://lod.openlinksw.com/sparql?############# PREFIX xsd:<http://www.w3.org/2001/XMLSchema#> PREFIX dbpedia-owl:<http://dbpedia.org/ontology/> SELECT ?person WHERE{ ?person dbpedia-owl:birthDate "1967-08-21"^^xsd:date . } ############# I suspect it's a problem of the "official" endpoint. Any idea about that? cheers, roberto
Roberto,I dropped a more detailed response on G+ at: https://plus.google.com/112399767740508618350/posts/711dfZYqGyA . It includes revises SPARQL queries that leverage inference context so that property name disparity no longer messes up the SPARQL query results.
One problem we've discovered is that our proxy settings are skewing the results.
There are also some timezone issues that resulted from doing DBpedia dataset QA in one timezone and uploading the finished product to another, hence the tweaks to your original query re. timezone handling.
-- Regards, Kingsley Idehen President& CEO OpenLink Software Web: http://www.openlinksw.com Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca: kidehen
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