Gets or sets a reference number used to identify the reservation by office applications at operators side(e.g. CETS).
The value handed over while creating the reservation has to be unique for the reservations a customer, because it's used to identify a single reservation of a customer. Therefore, the value can't be updated during Edit-Process of an existing reservation by any module, excepting the registered module that initially stores the SystemReferenceNumber.
Reservation Class | SunnyCars.Schema.Osi.WsReservation.V4 Namespace