The ISO 20022 Repository consists of two major parts: the Data Dictionary and the Business Process Catalogue.
The Data Dictionary contains Business Concepts, Message Concepts and Data Types. All these items are reusable and are called Dictionary Items. The Data Dictionary as a whole is under release control.
The Business Process Catalogue is organised in Business Areas. The communication requirements and the interaction requirements in the various Business Areas are supported by Business Transactions. All items that are stored in the Business Process Catalogue are called Catalogue Items. The Catalogue of ISO 20022 messages is also part of the Business Process Catalogue. It gives access to the full documentation of the ISO 20022 messages. This diagram shows the high level structure of the ISO 20022 Repository.