Class: RKD::Query::Sparql

Inherits:

Object

• Object
• RKD::Query::Sparql

Defined in:

lib/r_k_d/query/sparql.rb

Constant Summary

ENDPOINT =

"https://rkd.triply.cc/_api/datasets/rkd/RKD-Knowledge-Graph/services/SPARQL/sparql"

BASE_QUERY =

<<~SPARQL
  PREFIX rkd: <https://data.rkd.nl/def#>
  PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
  PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
  PREFIX crm: <http://www.cidoc-crm.org/cidoc-crm/>
  prefix la: <https://linked.art/ns/terms/>

  SELECT ?property ?propertyLabel ?value ?symbolicContent ?prefLabel ?tookPlaceAt ?tookPlaceAtTimeSpan ?tookPlaceAtTimeSpanBegin ?tookPlaceAtTimeSpanEnd ?placePoint ?placeLabel ?placeRef ?timeSpan ?start ?end ?domain ?range ?studyLabel ?studyReference ?referenceContent
  WHERE {
    <https://data.rkd.nl/artists/{{rkd_id}}> ?property ?value.
    FILTER (
      !(?property in (crm:P67i_is_referred_to_by, crm:P1_is_identified_by, crm:P62i_is_depicted_by, la:member_of))
      )
    OPTIONAL {
      ?property rdfs:label ?propertyLabel.
      FILTER (lang(?propertyLabel) = "en")
    }
    OPTIONAL {
      ?value crm:P190_has_symbolic_content ?symbolicContent
    }
    OPTIONAL {
      ?value skos:prefLabel ?prefLabel
      FILTER (lang(?prefLabel) = "en")
    }
    OPTIONAL {
      ?value crm:P7_took_place_at ?tookPlaceAt.
      ?value crm:P4_has_time-span ?timeSpan.
      ?tookPlaceAt crm:P168_place_is_defined_by ?placePoint.
      ?tookPlaceAt rdfs:label ?placeLabel.
      ?tookPlaceAt skos:exactMatch ?placeRef.
      ?timeSpan crm:P82a_begin_of_the_begin ?start.
      ?timeSpan crm:P82b_end_of_the_end ?end.
    }
    OPTIONAL {
      ?value crm:P7_took_place_at ?tookPlaceAt.
      ?tookPlaceAt rdfs:label ?placeLabel.
      ?tookPlaceAt skos:exactMatch ?placeRef.
    }
    OPTIONAL {
      ?value crm:P01i_is_domain_of ?domain.
      ?domain crm:P02_has_range ?range.
      ?range skos:prefLabel ?studyLabel.
    }
    OPTIONAL {
      ?value crm:P01i_is_domain_of ?domain.
      ?domain crm:P02_has_range ?range.
      ?value crm:P67i_is_referred_to_by ?studyReference.
      ?studyReference crm:P190_has_symbolic_content ?referenceContent
    }
    OPTIONAL {
      ?value crm:P4_has_time-span ?tookPlaceAtTimeSpan.
      ?tookPlaceAtTimeSpan crm:P82a_begin_of_the_begin ?tookPlaceAtTimeSpanBegin.
      ?tookPlaceAtTimeSpan crm:P82b_end_of_the_end ?tookPlaceAtTimeSpanEnd.
    }
  }
SPARQL

Class Method Summary

• .find(id) ⇒ Object
• .query(id) ⇒ Object

Class Method Details

.find(id) ⇒ Object

# File 'lib/r_k_d/query/sparql.rb', line 67

def find id
  data = FileCache.cache("sparql-#{id}") do
    HTTP.post_json ENDPOINT, {query: query(id)}
  end

  JSON.parse(data)
end

.query(id) ⇒ Object

# File 'lib/r_k_d/query/sparql.rb', line 63

def query id
  BASE_QUERY.sub("{{rkd_id}}", id.to_i.to_s)
end