prefixes:
  rr: http://www.w3.org/ns/r2rml#
  foaf: http://xmlns.com/foaf/0.1/
  xsd: http://www.w3.org/2001/XMLSchema#
  rdfs: http://www.w3.org/2000/01/rdf-schema#
  dc: http://purl.org/dc/elements/1.1/
  rev: http://purl.org/stuff/rev#
  gtfs: http://vocab.gtfs.org/terms#
  geo: http://www.w3.org/2003/01/geo/wgs84_pos#
  schema: http://schema.org/
  dct: http://purl.org/dc/terms/
  rml: http://semweb.mmlab.be/ns/rml#
  ql: http://semweb.mmlab.be/ns/ql#
  rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#

mappings:
  stops:
    sources:
      - [./data/gtfs-csv-01/STOPS.csv~csv]
    s: http://transport.linkeddata.es/madrid/metro/stops/$(stop_id)
    po:
      - [a,gtfs:Stop]
      - p: gtfs:parentStation
        o:
          - mapping: stops2
            condition:
              function: equal
              parameters:
                - [str1, $(parent_station)]
                - [str2, $(stop_id)]
  stops2:
    sources:
      - [./data/gtfs-csv-01/STOPS.csv~csv]
    s: http://transport.linkeddata.es/madrid/metro/stops/$(stop_id)
    po:
      - [a,gtfs:Stop]