239

• License: https://www.gnu.org/licenses/gpl-3.0

• Uses method in: https://github.com/WDscholia/scholia/tree/master/scholia/app/templates/work_citation-graph.sparql

rq turtle/ttl

Work aspect: citation graph

Use at

• https://query.wikidata.org/sparql

PREFIX p: <http://www.wikidata.org/prop/>
PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
PREFIX ps: <http://www.wikidata.org/prop/statement/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
#defaultView:Graph

PREFIX target: <http://www.wikidata.org/entity/Q28942417>

SELECT
  ?citing_work ?citing_workLabel ?rgb 
  ?cited_work ?cited_workLabel
WITH { 
  SELECT (COUNT(*) AS ?count) ?citing_work WHERE {
    target: (^wdt:P2860 | wdt:P2860) / (^wdt:P2860 | wdt:P2860)? ?citing_work .
  }
  GROUP BY ?citing_work
  ORDER BY DESC(?count)
  LIMIT 40
} AS %citing_works
WITH { 
  SELECT (COUNT(*) AS ?count_) ?cited_work WHERE {
    target: (^wdt:P2860 | wdt:P2860) / (^wdt:P2860 | wdt:P2860)? ?cited_work .
  }
  GROUP BY ?cited_work
  ORDER BY DESC(?count_)
  LIMIT 40
} AS %cited_works
WITH {
  SELECT (MAX(?count) AS ?max_count) WHERE {
    INCLUDE %citing_works
    BIND(1 AS ?dummy)
  } 
  GROUP BY ?dummy
} AS %max_count
WHERE {
  INCLUDE %citing_works
  INCLUDE %max_count
  INCLUDE %cited_works
  
  ?citing_work wdt:P2860 ?cited_work .
  
  BIND(STR(xsd:integer(99 * (1 - ?count / ?max_count))) AS ?grey)
  BIND(CONCAT(SUBSTR("0", 1, 2 - STRLEN(?grey)), ?grey) AS ?padded_grey)
  BIND(CONCAT(?padded_grey, ?padded_grey, ?padded_grey) AS ?rgb)

  { 
      ?citing_work (p:P50) ?citing_author_statement . 
      ?citing_author_statement pq:P1545 "1" .
      ?citing_author_statement ps:P50 ?citing_author .
      ?citing_author rdfs:label ?citing_author_name .
      filter(lang(?citing_author_name) = 'en')
    }
    union 
  	{ 
      ?citing_work (p:P2093) ?citing_author_statement . 
      ?citing_author_statement pq:P1545 "1" .
      ?citing_author_statement ps:P2093 ?citing_author_name .
    }
  
    { 
      ?cited_work (p:P50) ?cited_author_statement . 
      ?cited_author_statement pq:P1545 "1" .
      ?cited_author_statement ps:P50 ?cited_author .
      ?cited_author rdfs:label ?cited_author_name .
      filter(lang(?cited_author_name) = 'en')
    }
    union 
  	{ 
      ?cited_work (p:P2093) ?cited_author_statement . 
      ?cited_author_statement pq:P1545 "1" .
      ?cited_author_statement ps:P2093 ?cited_author_name .
    }

    ?citing_work wdt:P577 ?citing_date . 
    ?cited_work wdt:P577 ?cited_date . 
    bind(year(?citing_date) as ?citing_year)
    bind(year(?cited_date) as ?cited_year)
    bind(concat(?citing_author_name, ", ", str(?citing_year)) as ?citing_workLabel)
    bind(concat(?cited_author_name, ", ", str(?cited_year)) as ?cited_workLabel)
}
ORDER BY DESC(?count)

graph TD