query-329b64886277a032f541749148f1f320

rq turtle/ttl

A source is also a topicWikidata describes subjects/topics (towns, animals, roads, paintings). A source may also be a subject/topic, e.g., reviews treat other works that are potential sources as subject/topic. The journals (where a source is published) is a subject described in Wikipedia. The authors publishing a paper may be described in Wikipedia. Listing of items with a subject that has a subject:

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 ?item ?itemLabel ?item2 ?item2Label ?subject ?subjectLabel WHERE {
  ?item wdt:P921 ?item2 .
  ?item2 wdt:P921 ?subject . 
  ?item wdt:P31 wd:Q265158 . 
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en,da". }
}

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v1("?item"):::projected v2("?item2"):::projected v3("?subject"):::projected c7(["#91;AUTO_LANGUAGE#93;,en,da"]):::literal c5(["bd:serviceParam"]):::iri c3(["wd:Q265158"]):::iri v1 --"wdt:P921"--> v2 v2 --"wdt:P921"--> v3 v1 --"wdt:P31"--> c3 subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c5 --"wikibase:language"--> c7 end