see also TAF revision recommendation: https://www.era.europa.eu/sites/default/files/library/docs/recommendation/era_006rec1128_2020_recommendation_taf-tsi_revision_en.pdf , esp. Appendix 2, and final report https://www.era.europa.eu/sites/default/files/library/docs/recommendation/era_006rec1128_2020_recommendation_taf-tsi_revision_accompanying_report_en.pdf Semantics to be refined. Hints: Train operator includes passenger (train) operator, freight (train) operator, and companies providing traction only. "Integrated company" (not listed) implies infrastructure and train operations, at least. "Infrastructure manager" often implies station and terminal manager.