query-c81aac34a9a4bee48de685cff22a3d7f

rq turtle/ttl

of the two sets of colours. There are, for the example lighthous, three colours and the product thus consists of nine (3×3) rows of which three have an unbound ?qual. See the following query:en:Cartesian product what you get is the ?colour2 and ?colour: When you ask both for Tagishsimon@

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 ps: <http://www.wikidata.org/prop/statement/>
PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
PREFIX p: <http://www.wikidata.org/prop/>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT ?item ?itemLabel ?colourLabel ?colour2Label ?qualLabel WHERE {
  VALUES ?value {wd:Q40125473} FILTER(?item=?value)

 # ?item wdt:P462 ?colour . #compare the results with this line commented and not commented

  ?item p:P462 ?mem . #item has a colour
  ?mem ps:P462 ?colour2 .
  OPTIONAL { ?mem pq:P518 ?qual . }  # colour has a P518 qualifier
# FILTER(!BOUND(?qual)) # qualifier is null
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en,sv". }
}

Query found at

• https://www.wikidata.org/wiki/Wikidata:Request_a_query/Archive/2018/01