  Complying with the EU Regulation on multimodal transportation services
requires sharing data on the National Access Points in one of the standards
(e.g., NeTEx and SIRI) indicated by the European Commission. These standards
are complex and of limited practical adoption. This means that datasets are
natively expressed in other formats and require a data translation process for
full compliance.
  This paper describes the solution to turn the authoritative data of three
different transport stakeholders from Italy and Spain into a format compliant
with EU standards by means of Semantic Web technologies. Our solution addresses
the challenge and also contributes to build a multi-modal transport Knowledge
Graph of interlinked and interoperable information that enables intelligent
querying and exploration, as well as facilitates the design of added-value
services.
