section Aggregator
  description   Messages mainly used for interaction with the Aggregator.
  message amount-to-pay The amount to be paid
  message fund-transfer Transfer fund from a account (bank) to the web-shop.
  message transfer-successful The funds were successfully transferred
  message transfer-failed The funds were not transferred
  message payment-successful The overall payment was successful
  message payment-failed The overall payment failed
  protocol Human Used to describe human readable messages.