query-a0348fad9b6431a2ed74dec97177ae86

rq turtle/ttl

Example with horses/optionalsOptionals can affect total number of results:

Use at

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 ?book ?title ?illustratorLabel ?publisherLabel ?published
WHERE
{
             ?book  wdt:P50   wd:Q35610.      # 138
  OPTIONAL { ?book  wdt:P1476 ?title.       } # 2 Q25713842
  OPTIONAL { ?book  wdt:P110  ?illustrator. } # 0
  OPTIONAL { ?book  wdt:P123  ?publisher.   } # 2 Q2297190
  OPTIONAL { ?book  wdt:P577  ?published.   } # 0
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v1("?book"):::projected v3("?illustrator") v5("?published"):::projected v4("?publisher") v2("?title"):::projected c8(["bd:serviceParam"]):::iri c10(["en"]):::literal c2(["wd:Q35610"]):::iri v1 --"wdt:P50"--> c2 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v1 -."wdt:P1476".-> v2 end subgraph optional1["(optional)"] style optional1 fill:#bbf,stroke-dasharray: 5 5; v1 -."wdt:P110".-> v3 end subgraph optional2["(optional)"] style optional2 fill:#bbf,stroke-dasharray: 5 5; v1 -."wdt:P123".-> v4 end subgraph optional3["(optional)"] style optional3 fill:#bbf,stroke-dasharray: 5 5; v1 -."wdt:P577".-> v5 end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c8 --"wikibase:language"--> c10 end