Dataset - CKAN MobiDataLab

Validations on the rail network: Number of validations per day (1st half of 2...

Validation data is updated at the end of February and at the end of August. This dataset presents the number of validations of travelers by day per stop and per ticket on the...
- https://www.iana.org/assignments/media-types/application/json
- https://www.iana.org/assignments/media-types/text/csv

You can also access this registry using the API (see API Docs).