Hello,
using the official DBpedia endpoint (http://dbpedia.org/sparql), I get
missing results on this CONSTRUCT query:
CONSTRUCT { <http://dbpedia.org/resource/Leipzig> ?p0 ?o0 .
?o0 ?p1 ?o1 .}
WHERE { <http://dbpedia.org/resource/Leipzig> ?p0 ?o0 .
OPTIONAL { ?o0 ?p1 ?o1 . } }
ORDER BY ?p0 ?o0 ?p1 ?o1
For instance, it does not contain a "populationTotal" triple. The
following simpler query contains this triple:
CONSTRUCT { <http://dbpedia.org/resource/Leipzig> ?p0 ?o0 .}
WHERE { <http://dbpedia.org/resource/Leipzig> ?p0 ?o0 . }
ORDER BY ?p0 ?o0
I thought this could be related to anytime queries, but then it's not
such a hard query (one join and "Leipzig" is a fixed resource).
What is the reason for the missing triples?
Kind regards,
Jens
--
Dipl. Inf. Jens Lehmann
Department of Computer Science, University of Leipzig
Homepage: http://www.jens-lehmann.org
GPG Key: http://jens-lehmann.org/jens_lehmann.asc
