query-a56182e8de7aac33fc71254f3c57631d

PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT distinct ?errata ?errataLabel ?itemLabel ?item (count(?item) as ?count)
WHERE 
{

  ?errata wdt:P31 wd:Q1348305 .                  # ?errata is an errata
  filter not exists {?itemZ wdt:P2507 ?errata . } # there's no ?item pointing to the errata.
  ?errata rdfs:label ?errataLabel . filter(lang(?errataLabel)="en")
  filter(strstarts(?errataLabel,"Erratum:"))
  bind(replace(?errataLabel,"Erratum: ","") as ?itemLabel) .
  ?item rdfs:label ?itemLabel.
  filter(strlen(?itemLabel)>20)
  ?errata wdt:P1433 ?PI .
  ?item wdt:P1433 ?PI .
 # ?errata wdt:P50 ?nn .
 # ?item wdt:P50 ?nn .
 # ?errata wdt:P2093 ?nn2 .
 # ?item wdt:P2093 ?nn2 . 
} group by ?errata ?errataLabel ?itemLabel ?item having (?count=1)

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v7("?PI") v8("?count") v5("?errata"):::projected v3("?errataLabel"):::projected v6("?item"):::projected v6("?itemLabel"):::projected v4("?itemZ") c7(["wd:Q1348305"]):::iri f0[["?count = '1^^xsd:integer'"]] f0 --> v8 f1[["string-length(?itemLabel) > '20^^xsd:integer'"]] f1 --> v6 f2[["starts-with(?errataLabel,'Erratum:')"]] f2 --> v3 f3[["?errataLabel = 'en'"]] f3 --> v3 f4[["not "]] subgraph f4e0["Exists Clause"] e0v1 --"wdt:P2507"--> e0v2 e0v2("?errata"):::projected e0v1("?itemZ"):::projected end f4--EXISTS--> f4e0 f4 --> v4 f4 --> c5 f4 --> v5 v4 --"wdt:P2507"--> v5 v5 --"wdt:P31"--> c7 v5 --"rdfs:label"--> v3 bind5[/"replace(?errataLabel,'Erratum: ','')"/] v3 --o bind5 bind5 --as--o v6 v6 --"rdfs:label"--> v6 v5 --"wdt:P1433"--> v7 v6 --"wdt:P1433"--> v7 bind7[/"count(?item)"/] v6 --o bind7 bind7 --as--o v8