era:concepts/gsmr-optional-functions/OptionalFunctions
http://data.europa.eu/949/concepts/gsmr-optional-functions/OptionalFunctions
rdfs:comment
http://www.w3.org/2000/01/rdf-schema#comment
Concept scheme grouping optional GSM-R functions
@en
era:concepts/
http://data.europa.eu/949/concepts/