SPARQL query language tag weirdness
-
19-09-2019 - |
Question
This works:
SELECT * WHERE{
?x rdfs:label "Chalti Ka Naam Gaadi"@en .
?x foaf:name ?z .
}
(Results on DBpedia SPARQL Explorer)
This doesn't:
SELECT * WHERE{
?x foaf:name "Chalti Ka Naam Gaadi" .
?x rdfs:label ?z .
}
(Results on DBpedia SPARQL Explorer)
Why?
Solution
Your issue is that plain literals with language tags: "Chalti Ka Naam Gaadi"@en
are not the same as plain literals without language tags: "Chalti Ka Naam Gaadi"
Literals are structured things made of a lexical part, language (maybe), or datatype (maybe).
You could filter: FILTER ( str( ?name ) = "Chalti Ka Naam Gaadi")
(str()
returns the lexical part of the literal)
but, depending on the query engine, that will be much slower.
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