open-07.rq

Jena推理机

PREFIX     :    <http://example/>
PREFIX  xsd:    <http://www.w3.org/2001/XMLSchema#>

SELECT *
{
    ?x1 :p ?v1 .
    ?x2 :p ?v2 .
    FILTER ( ?v1 = ?v2 )
}
ORDER BY ?x1 ?x2