The SNCB sales API has their own identifiers and doesn’t use global URIs. E.g., for Ostend, the Sales API ID is 108891702 while ours is http://irail.be/stations/NMBS/008891702.
I propose to add a column to stations.txt that has the sales API identifier for SNCB. I however don’t have access to this list. Is someone else able to pull request this?