Hi folks,
What's the best way to retrieve types (rdf:type) of a large amount of
concepts, in association with the concept itself? For instance:
[Barack_Obama:Person, United_States:Place,...]
I came up with this query:
SELECT ?c ?t {
{<concept1> a ?t. <concept1> foaf:isPrimaryTopicOf ?c} UNION
{<concept2> a ?t. <concept2> foaf:isPrimaryTopicOf ?c} UNION
.
.
. <== repeat for all concepts
}
Which outputs the desired result but: 1. it's slow (takes ~2.3s for 200
concepts) 2. it doesn't go beyond 200-something concepts because apparently
there's a limit on the number of nested subqueries in a query.
Is there a better way to accomplish this?
Regards,
Parsa
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