Hello,
the IN is very fast and I would recommend to anyone using it.
btw. will IN be a part of the next SPARQL recommendation?
I have just a short question (tested on dbpedia):
SELECT DISTINCT ?subject { {
?subject a ?expanded0 } UNION {
?subject a ?expanded1 }
FILTER ( ?expanded0 IN ( <http://dbpedia.org/ontology/Airline>,
<http://dbpedia.org/ontology/Band>) ).
FILTER ( ?expanded1 IN ( <http://dbpedia.org/ontology/Album>,
<http://dbpedia.org/ontology/Book>) ).
} LIMIT 50
The query above doesn't work, while this one works:
SELECT DISTINCT ?subject { {
?subject a ?expanded0 .
FILTER ( ?expanded0 IN ( <http://dbpedia.org/ontology/Airline>,
<http://dbpedia.org/ontology/Band>) ).
} UNION {
?subject a ?expanded1 .
FILTER ( ?expanded1 IN ( <http://dbpedia.org/ontology/Album>,
<http://dbpedia.org/ontology/Book>) ).
} } LIMIT 50
Is there a reason behind it or just a glitch?
Regards,
Sebastian
Am 23.03.2010 02:56, schrieb Alexander Sidorov:
Hi Ivan,
Thank you! I should guess by analogy with SQL...
Does IN operator work with subqueries? I have the following query:
SELECT DISTINCT ?s ?p ?o
FROM <http://www.semanticweb.org/ontologies/2010/1/EventsContent.owl#>
WHERE
{
?s ?p ?o
FILTER
(
?s in
(
(
SELECT DISTINCT ?event
FROM
<http://www.semanticweb.org/ontologies/2010/1/EventsContent.owl#>
WHERE
{
?event ?property ?value .
?value bif:contains "virtuoso" OPTION (SCORE ?valueScore) .
}
GROUP BY ?event
ORDER BY DESC (sum(?valueScore))
)
)
)
}
but it returns only first event.
Regards,
Alexander
2010/3/23 Ivan Mikhailov <imikhai...@openlinksw.com
<mailto:imikhai...@openlinksw.com>>
Hello Alexander,
> Let's imagine we have a list of entities uris' as input and we
need to
retrieve all triples for each entity.
> Is there any way to execute it using one query?
We have an IN operator extension:
select ?p ?o
where
{
?s ?p ?o .
filter (?s in (<someGraph#entity1>, <someGraph#entity2>, ...
<someGraph#entityN> ) )
}
Best Regards,
Ivan Mikhailov
OpenLink Software
http://virtuoso.openlinksw.com
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