query-fbdcfd7a33aa85f245e8a80e3a38a5c7

rq turtle/ttl

added before 2016-10

Demonstrates filtering for "unknown value"

SELECT ?human ?humanLabel WHERE { ?human wdt:P21 ?gender FILTER isBLANK(?gender) . SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" } }

Use at

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX bd: <http://www.bigdata.com/rdf#>
#added before 2016-10
# Demonstrates filtering for "unknown value"
SELECT ?human ?humanLabel
WHERE
{
    ?human wdt:P21 ?gender
    FILTER isBLANK(?gender) .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" }
}

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v1("?gender") v2("?human"):::projected c3(["bd:serviceParam"]):::iri c5(["#91;AUTO_LANGUAGE#93;,en"]):::literal f0[["isBlank(?gender)"]] f0 --> v1 v2 --"wdt:P21"--> v1 subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c3 --"wikibase:language"--> c5 end