Catalogue of messages
What is a SupplementaryData extension ?
Some ISO 20022 message definitions include a 'SupplementaryData' component that can be used by communities of users to add information to a message that is not catered for by other components of the message definition.
The SupplementaryData component is made of two elements:
Development of a SupplementaryData message extension
The information in the SupplementaryData component must be ISO 20022 compliant: it requires development of a compliant message extension model and its components must be registered in the ISO 20022 Data Dictionary.
The creation of a SupplementaryData message extension is subject to the approval of the SEG in charge of the message. Two use cases can be considered by the SEG:
Use of of a SupplementaryData message extension
The use, processing or transmission of a SupplementaryData message extension are to be preliminary agreed by all parties involved.
Creation and Maintenance of a SD component
Request for the creation of a SupplementaryData message extension must be introduced to the ISO 20022 Registration Authority using the usual Change Request form.
A message extension is specifically approved for use with a particular version of a message definition. If a new version of the message definition is approved, the related message extension(s) must be reviewed by the submitting organisation(s) and re-submitted to the Registration Authority for qualification with the new version of the message definition.
Registered ISO 20022 Supplementary Data message extensions
Including the Message Definition Report (MDR) and Schema of each registered Supplementary Data message extension
Version: 26 September 2023
This document clarifies, through a number of questions and answers, how to use the ISO 20022 Supplementary Data extension mechanism in ISO 20022 messages.