jena-sdb/testing/Optionals1/opt-1.rq - jena - Git at Google

 # single triple pattern, single optional
 PREFIX : <http://example/>

 SELECT * WHERE
 {
     ?x :p 1 .
     OPTIONAL { ?x :q1 ?v }
 }
	# single triple pattern, single optional
	PREFIX : <http://example/>

	SELECT * WHERE
	{
	?x :p 1 .
	OPTIONAL { ?x :q1 ?v }
	}