2.2 Business Application Header

This topic provides information on Business Application Header and its tags in messages.

Business Application Header

The Business Application Header is a header that has been defined by the ISO 20022 community to form part of the business message. Specifically, the BAH is an ISO20022 message definition which can be combined with any other ISO20022 message definition to form a business message.

It gathers data about the message such as which organization has sent the business message, which organization should be receiving it, the identity of the message itself, the reference for the message and so on.

The purpose of the BAH is to provide a consistent and predictable way for the data to be conveyed with the message, regardless of implementation factors such as the choice of network. This does not prevent such data being conveyed either within the ISO 20022 message definition itself, or as part of a network header.

BAH IS0 20022 Regulation

An ISO 20022 message together with its Business Application Header forms a business message.

Figure 2-4 BAH IS0 20022 Regulation

IS0 20022 Business Application Structure

The Business Layer deals with business messages. The behaviour of the business messages is fully described by the business transaction and the structure of the business messages is fully described by the message definitions and related message rules, rules and market practices all of which are registered in the ISO 20022 Repository.

• Tags in Messages
  This topic provides information on Business Application Header and its tags in messages