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An introduction to RDF querying in SPARQL
Zwifi
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Projection
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Projection
Binding in the SELECT clause
bind.sparql
matrix.ttl
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PREFIX yaco: <
https://www.irit.fr/recherches/MELODI/ontologies/c
inema#
>
PREFIX rdf: <
http://www.w3.org/1999/02/22-rdf-syntax-ns#
>
SELECT ?actor (?curYear-?birthYear AS ?age)
WHERE {
?actor rdf:type yaco:Actor;
yaco:birthYear ?birthYear.
BIND(year(now()) as ?curYear)
}
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1
@prefix yaco: <
https://www.irit.fr/recherches/MELODI/ontologies/c
inema#
> .
Enter to Rename, Shift+Enter to Preview
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Binding for reuse in the WHERE clause
bind_as.sparql
matrix.ttl
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PREFIX yaco: <
https://www.irit.fr/recherches/MELODI/ontologies/c
inema#
>
PREFIX rdf: <
http://www.w3.org/1999/02/22-rdf-syntax-ns#
>
SELECT ?actor ?age
WHERE {
?actor rdf:type yaco:Actor;
yaco:birthYear ?birthYear.
BIND(year(now())-?birthYear AS ?age)
}
Enter to Rename, Shift+Enter to Preview
1
@prefix yaco: <
https://www.irit.fr/recherches/MELODI/ontologies/c
inema#
> .
Enter to Rename, Shift+Enter to Preview
Run
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