ID-based travellingTravellerValidatorSales channelPayment Service ProviderTicketingCoordinatorEnters into agreement on Travel-IDInforms on status for Travel-IDDistributes status for Travel-IDPresents travel-ID to travelReads travel-ID and compares with locally stored travel entitlementsIf travel entitlement is found, the traveller is admitted on-boardSends validation eventFlashes green lightIf entitlement can not be found, query is sent to the Ticketing Service.Possibly the traveller is admitted on-board and the travel company accepts a credit risk.Query for valid ticketReponse on valid ticketIf travel entitlement is found, the traveller is admitted on-boardSends validation eventFlashes green lightIf valid ticket can not be found, a request to purchase such ticket is conveyed to the travellers sales channelRequest to puchase ticketObtain paymentSends request to issue ticketIssued ticketIssued ticketFlashes green lightoptoptoptopt