@prefix dc: <http://purl.org/dc/elements/1.1/> .
@prefix : <http://example.org/book/> .
@prefix ns: <http://example.org/ns#> .
:book1 dc:title "SPARQL Tutorial" .
:book2 dc:title "The Semantic Web" .
我该怎么检查三联线
:book1 dc:title "SPARQL Tutorial" .
存在?
我能做到
SELECT ?book where {?book dc:title "SPARQL Tutorial"}