Hi everyone, two SPARQL queries which I assumed are the same give different
results in Apache Jena. The two queries are:
SELECT * WHERE {
<https://www.tno.nl/kb1/meta/knowledgeinteractions/react/changed/act/requirement>
a ?someClass
FILTER NOT EXISTS {
<https://www.tno.nl/kb2/meta/knowledgeinteractions/post/new/act/satisfaction> a
?someClass
}
}
SELECT * WHERE
{
?req a ?someClass
FILTER NOT EXISTS {
?sat a ?someClass
}
}
VALUES (?req ?sat) {
(<https://www.tno.nl/kb1/meta/knowledgeinteractions/react/changed/act/requirement>
<https://www.tno.nl/kb2/meta/knowledgeinteractions/post/new/act/satisfaction>)
}
Note that the queries are basically the same, but the second query uses the
VALUES keyword to bind the ?req and ?sat variables, while the first query
replaces the actual ?req and ?sat variables occurrences instead.
Does anyone know what I am missing?
Best regards,
Barry
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