kbss-cvut/owl2query

A SPARQL-DL^NOT engine

owl2query's Issues

OWL2Query seems to ignore VALUES expression

When executing the following query:

SELECT ?x WHERE { 
  ?x a <http://krizik.felk.cvut.cz/ontologies/jopa/entities#OWLClassA> . 
} 
VALUES (?x) {(<http://krizik.felk.cvut.cz/ontologies/jopa/tests/entityA_754>)}

the engine returns all instances of type http://krizik.felk.cvut.cz/ontologies/jopa/entities#OWLClassA instead of just the one identified by the value provided in VALUES.
From debugging, it seems that the internal representation (QueryImpl) does not have any structure that could be mapped to a VALUES expression and instead of throwing an exception (like for other unsupported SPARQL constructs), the VALUES expression is silently ignored.