Wikisource:Wikidata/Maintenance/Encyclopedia articles

Key items and properties

• published in (P1433)
• main subject (P921)
• encyclopedia article (Q13433827)
• biographical article (Q19389637)

Any encyclopedia article without a main subject (P921)

# Any encyclopedia article without a main subject (P921)
SELECT ?item ?itemLabel WHERE {
  ?item wdt:P31 wd:Q13433827. # P31 is a: Q13433827 encyclopedia article
  MINUS { ?item wdt:P921 [] } . # P921: main subject
  
  # the label service is too slow, so try this
  OPTIONAL {
    ?item rdfs:label ?itemLabel. FILTER( LANG(?itemLabel)="en" )
  }
}

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Articles without main subjects, by parent work

Encyclopædia Britannica 11th edition (Q867541)

EB1911 articles with no main subject

A Compendium of Irish Biography (Q19020593)

Compendium of Irish Biography articles with no main subject