On 4/18/2012 8:12 AM, Kjetil Kjernsmo wrote:
On Tuesday 17. April 2012 11.53.21 reza ramezani wrote:
I need to extract Person10 or " Person10 Like
http://musicbrainz.org/Person3"; , because Person10 refers to an external
IRI rather that DBPedia Now I need to a SPARQL command that calculate this
for me. can you help me for do this?
I'm not quite sure I understand your question, but I think you could use a
regular expression to filter the IRIs, like
FILTER(regex(str(?uri), "musicbrainz")))
Then you need to formulate your query around that of course.
Depending on what exactly you mean by "external IRIs", there are a few
approaches. Kjetil's will find you IRIs that match musicbrainz
specifically. You could also use a negated regex to find IRIs that are
not dbpedia.org IRIs.
Personally, I'd prefer not to rely on IRI structure and might try
something like:
SELECT ?iri {
?s ?p ?iri .
OPTIONAL { ?iri ?p2 ?o2 }
FILTER(isIRI(?iri?) && !bound(?o2))
...to find IRI objects of triples that are not themselves talked about
as subjects in the dbpedia data set.
Lee
Best,
Kjetil
