PREFIX : <http://example/> | |
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> | |
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> | |
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> | |
SELECT ?v ?y | |
WHERE | |
{ :x ?p1 ?y . | |
OPTIONAL | |
{ | |
?y ?p ?v | |
FILTER regex(?v, "^a") | |
} | |
} | |