query-9c39427f31301378638e6de5b2bc179d

rq turtle/ttl

Wikisource authors, DNB No WP SELECT ?item ?itemLabel ?subject ?subjectLabel ?article WHERE {

?item wdt:P1433 wd:Q15987216 . ?item wdt:P31 wd:Q19389637. ?item wdt:P921 ?subject . ?article schema:about ?subject ; schema:isPartOf https://en.wikisource.org/ .

OPTIONAL { ?article2 schema:about ?subject ; schema:isPartOf https://en.wikipedia.org/ } FILTER ( !bound(?article2) )

SERVICE wikibase:label {
    bd:serviceParam wikibase:language "en" .
}

}

Use at

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX schema: <http://schema.org/>
PREFIX bd: <http://www.bigdata.com/rdf#>
#Wikisource authors, DNB No WP
SELECT ?item ?itemLabel ?subject ?subjectLabel ?article WHERE {

  ?item wdt:P1433 wd:Q15987216 .
  ?item wdt:P31 wd:Q19389637.
  ?item wdt:P921 ?subject .
  ?article  schema:about ?subject ;
            schema:isPartOf <https://en.wikisource.org/> .

  OPTIONAL { ?article2 schema:about ?subject ; schema:isPartOf <https://en.wikipedia.org/> }
  FILTER ( !bound(?article2) )

    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; v4("?article"):::projected v1("?article2") v2("?item"):::projected v3("?subject"):::projected c4(["wd:Q19389637"]):::iri c13(["en"]):::literal c9([https://en.wikipedia.org/]):::iri c11(["bd:serviceParam"]):::iri c2(["wd:Q15987216"]):::iri c8([https://en.wikisource.org/]):::iri f0[["not bound(?article2)"]] f0 --> v1 v2 --"wdt:P1433"--> c2 v2 --"wdt:P31"--> c4 v2 --"wdt:P921"--> v3 v4 --"schema:about"--> v3 v4 --"schema:isPartOf"--> c8 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v1 -."schema:about".-> v3 v1 --"schema:isPartOf"--> c9 end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c11 --"wikibase:language"--> c13 end