An interactive Travel, tourism and leisure data update request is sent by a supplier of a product or service to a global distribution system (GDS) to update the receiver’s data base for rates, availability, policy, and general information.  It may also be used to initialize the receiver’s system with a new product or service.  The message may also be sent by a GDS to a supplier when a travel agent has made updates to a traveller’s profile or a GDS needs to update an agency’s profile.

This message can only be used with ISO 9735 Version 4 or later.