section Terminal
  description   Messages mainly used for interaction with the Payment Terminal.
  message start-payment A request to start payment
  message start-verification The verification process is started
  message show-amount The amount to pay is shown
  message method-chosen The chosen method
  message contactless-failed The contact-less payment failed
  message mobile-failed The mobile payment failed
  message validate-pin The pin code is to be validated
  message pin-invalid The pin code was wrong
  message The customer paid his bill
  message confirm-pin The customer needs to confirm the pin-code
  protocol Human Used to describe human readable messages.