Ideally all member states will provide NeTEx files according to the European Passenger Information Profile (EPIP) on their respective National Access Point. Data4PT provides some artefacts to simplify producing and quality assure such information. These artefacts can be used as basis for the specification on national profiles.
A graphic and interactive technical presentation of the adapted schema is available along with EPIP-adapted version of the full NeTEx XML schema and a relevant example.
Follow the link.