query-19c718e091186b18f0dd9634959854d7
(with ^ which inverts it)?:^wdt:P50Maybe but items with P106, P569 and P27 are unlikely to have P50. Supposedly ?Norge wdt:P50 ?forfatter would be ?Norge wdt:P50 ?author
Use at
- https://query.wikidata.org/sparql
PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT ?author ?authorLabel ?dob ?work ?workLabel
WHERE
{
?author wdt:P27 wd:Q20.
?author wdt:P106 wd:Q482980.
OPTIONAL { ?author wdt:P569 ?dob }
OPTIONAL { ?author ^ wdt:P50 ?work }
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("?author"):::projected
v2("?dob"):::projected
v3("?work"):::projected
c8(["bd:serviceParam"]):::iri
c4(["wd:Q482980"]):::iri
c2(["wd:Q20"]):::iri
c10(["#91;AUTO_LANGUAGE#93;,en"]):::literal
v1 --"wdt:P27"--> c2
v1 --"wdt:P106"--> c4
subgraph optional0["(optional)"]
style optional0 fill:#bbf,stroke-dasharray: 5 5;
v1 -."wdt:P569".-> v2
end
subgraph optional1["(optional)"]
style optional1 fill:#bbf,stroke-dasharray: 5 5;
v3 -."wdt:P50".-> v1
end
subgraph s1["http://wikiba.se/ontology#label"]
style s1 stroke-width:4px;
c8 --"wikibase:language"--> c10
end