TS ISO 15022-2

TS ISO 15022-2 is the second part of the scheme for securities messages, focused on maintaining the data field dictionary and the catalogue of messages. It addresses the upkeep of the definitions and structures used in securities messaging so that they remain consistent, traceable, and suitable for exchange over time. The ISO 15022 family was developed to support a common language for message structures in financial markets.

Why the data field dictionary and message catalogue matter

In securities processing, the meaning of a message depends not only on its text but also on what each data field represents. The data field dictionary organises the definition and context of each field, while the message catalogue shows how those fields are used across messages and structures. This distinction helps different systems interpret the same message in the same way and supports operational consistency. In general technical terms, dictionaries and catalogues of this kind are essential tools for reducing coding errors and preserving consistency in financial data standards.

What this part covers in maintenance terms

This part of the standard is about maintenance of the dictionary and catalogue structure, meaning controlled lifecycle topics such as adding new fields, updating existing definitions, and evolving message structures in a managed way. That kind of maintenance helps a standard stay aligned with market practice and technical requirements. For users, it represents not only a message format, but also the reference that governs how that format is managed over time.

• Provides a shared terminology and structure for securities messages.
• Supports consistent management of data field definitions.
• Offers a controlled framework for updating the message catalogue.
• Helps reduce interpretation differences between financial systems.