Wikidata and the SNCF homepage only define those ids for stations in France, but the SNCF tickets also use those for international stations, following the same scheme, just not starting with 'FR' but with the corresponding country code (e.g. 'ESBST' for Barcelona or 'CHGVA' for Geneva).
- Can we relax Wikidata's constraint there and also add international ones?
- Is there a table of all international station codes used by SNCF somewhere?