homonym_search_on_gbif

rq turtle/ttl

• gbif
• homonym

a SPARQL query against the GBIF backbone RDF that finds true taxonomic homonyms: distinct taxa that share the same name but sit on different branches of the tree.

Use at

• https://qlever.dev/api/gbif

PREFIX skos:   <http://www.w3.org/2004/02/skos/core#>
PREFIX gbif:   <https://rs.gbif.org/terms/>
PREFIX rank:   <https://rs.gbif.org/terms/rank/>
PREFIX status: <https://rs.gbif.org/terms/status/>

SELECT ?pref ?rank ?a ?rootA ?b ?rootB WHERE {
  ?a skos:prefLabel ?pref ; gbif:rank ?rank ;
     gbif:taxonomicStatus status:accepted ; skos:broader+ ?ra .
  ?b skos:prefLabel ?pref ; gbif:rank ?rank ;          # same rank on both sides
     gbif:taxonomicStatus status:accepted ; skos:broader+ ?rb .
  ?ra gbif:rank rank:kingdom ; skos:prefLabel ?rootA .
  ?rb gbif:rank rank:kingdom ; skos:prefLabel ?rootB .
  FILTER(STR(?a) < STR(?b))
  FILTER(?rootA != ?rootB)
  FILTER(?rootA != "incertae sedis" && ?rootB != "incertae sedis")
}

graph TD
classDef projected fill:lightgreen;
classDef literal fill:orange;
classDef iri fill:yellow;
  v3("?a"):::projected 
  v4("?b"):::projected 
  v5("?pref"):::projected 
  v7("?ra")
  v6("?rank"):::projected 
  v8("?rb")
  v1("?rootA"):::projected 
  v2("?rootB"):::projected 
  c5([https://rs.gbif.org/terms/status/accepted]):::iri 
  c7([https://rs.gbif.org/terms/rank/kingdom]):::iri 
  f0[["?rootA != 'incertae sedis'?rootB != 'incertae sedis'"]]
  f0 --> v1
  f0 --> v2
  f1[["?rootA != ?rootB"]]
  f1 --> v1
  f1 --> v2
  f2[["str(?a) < str(?b)"]]
  f2 --> v3
  f2 --> v4
  v3 --"skos:prefLabel"-->  v5
  v3 --https://rs.gbif.org/terms/rank-->  v6
  v3 --https://rs.gbif.org/terms/taxonomicStatus-->  c5
  v3 --"skos:broader"-->  v7
  v4 --"skos:prefLabel"-->  v5
  v4 --https://rs.gbif.org/terms/rank-->  v6
  v4 --https://rs.gbif.org/terms/taxonomicStatus-->  c5
  v4 --"skos:broader"-->  v8
  v7 --https://rs.gbif.org/terms/rank-->  c7
  v7 --"skos:prefLabel"-->  v1
  v8 --https://rs.gbif.org/terms/rank-->  c7
  v8 --"skos:prefLabel"-->  v2