To the point

Amadeus has launched a railway booking interface, the merchant model,
which provides travel agencies around the world with one link to sell
multiple rail operators. This new offering sees Amadeus acting as a sales
agent for rail operators, simplifying contractual agreements, financial
flows and invoicing with travel agencies. Amadeus handles all set-up,
billing and settlement activities, and assumes financial and legal risks
of selling via travel agencies. Currently, the full offers of DB (German),
RENFE (Spanish), SNCF (French, available in CESE* only), Trenitalia
(Italian) and selected eastern European rail operators are available as
part of this model, with more expected to join, says Amadeus..