Basic requirements

These chapter explains the basic requirements to process payments with any payment system using the Redirect Integration.
Some payment systems may demand additional requirements which are listed further.
The SelectPayment defines the mdxi element which holds all payment relevant information.
The minimum information provided in the MDXI XML are the transaction id (of the merchant system; e.g. a order number) as Tid and the amount of the order as Price. Additional the URLs should be defined within the request, if the URLs are not configured via the Merchant Interface called MIF.

<?xml version="1.0" encoding="UTF-8"?>