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Q 的代码
q-langmatches-3.rq
PREFIX :
SELECT *
{ :x ?p ?v . FILTER langMatches(lang(?v), "*") . }
q-datatype-1.rq
PREFIX xsd:
PREFIX :
SELECT ?x ?v
WHERE
{ ?x :p ?v .
FILTER ( datatype(?v) = xsd:double ) .
}
q-langmatches-1.rq
PREFIX :
SELECT *
{ :x ?p ?v . FILTER langMatches(lang(?v), "en-GB") . }
q-langmatches-2.rq
PREFIX :
SELECT *
{ :x ?p ?v . FILTER langMatches(lang(?v), "en") . }
q-datatype-3.rq
# Whichliterals have xsd:string as a datatype
PREFIX :
PREFIX xsd:
SELECT ?x
{ ?x :p ?v .
FILTER( datatype(?v) = xsd:string )
}
q-uri-1.rq
PREFIX xsd:
PREFIX :
SELECT ?x ?v
WHERE
{ ?x :p ?v .
FILTER isURI(?v) .
}
q-str-1.rq
PREFIX xsd:
PREFIX :
SELECT ?x ?v
WHERE
{ ?x :p ?v .
FILTER ( str(?v) = "1" ) .
}
q-construct-2.rq
PREFIX ns:
PREFIX :
# No match => empty graph
CONSTRUCT
{ ?x ns:knows ?y }
WHERE
{ ?x ns:sameTown ?y }
q-reif-1.rq
PREFIX rdf:
CONSTRUCT
{ _:b0 rdf:subject ?s .
_:b0 rdf:predicate ?p .
_:b0 rdf:object ?o .
}
WHERE
{ ?s ?p ?o . }
q-reif-2.rq
PREFIX rdf:
CONSTRUCT
{ ?s ?p ?o .
}
WHERE
{ _:b0 rdf:subject ?s .
_:b0 rdf:predicate ?p .
_:b0 rdf:object ?o .
}