jena-sdb/testing/Integration/integrate-3.rq - jena - Git at Google

 PREFIX : <http://example/>

 SELECT *
 WHERE
  { { :x :p ?v
      OPTIONAL { ?v :p1 ?w }
    }
    UNION
    { :a :q1 ?v } }
	PREFIX : <http://example/>

	SELECT *
	WHERE
	{ { :x :p ?v
	OPTIONAL { ?v :p1 ?w }
	}
	UNION
	{ :a :q1 ?v } }