The hierarchical structure of the messages is provided through indentation in the tables below. In addition to the tabular description of the message, which should always be read in conjunction with Annex A, additional conformance rules, which go beyond XML Schema validation, are provided where necessary. The general conformance rules for all messages within this standard are provided in Clause 6.2.
Specific business processes between sender and recipient may require even further conformance rules. These are, however, not part of the standard and will need to be agreed by the business partners.