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An introduction to RDF querying in SPARQL

Zwifi
3,101 views
01 Welcome
02 Initial queries
03 Filters
04 Optionality
05 Negation
06 Alternatives
07 Projection
08 Grouping
09 Modifiers
Previous: Negation Next: Projection

Alternative

UNION

Conjunction of patterns
PREFIX yaco: <https://www.irit.fr/recherches/MELODI/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?person
WHERE {
?person rdf:type yaco:Actor.
?person rdf:type yaco:Director.
}
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Disjunction of patterns
PREFIX yaco: <https://www.irit.fr/recherches/MELODI/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?person
WHERE {
{?person rdf:type yaco:Actor.}
UNION
{?person rdf:type yaco:Director.}
}
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