The ISO 20022 messages use external code sets which are validated and approved by the SEGs.
The listed codes can be used in specific elements of the messages as indicated in the documents below. Unlike other ISO 20022 code sets, the codes are not included in the message schema with the message element they type. The purpose of externalising these codes is to be able to update the code sets (for example, add new codes) without impacting the messages themselves and, hence, without requiring the development of a new version of the messages that use these code sets.
The code sets are published in two sets of documents:
Download the External Code Sets spreadsheet - dated 28 April 2015
Download the Bank Transaction Code sets description - dated 16 June 2009
Download the possible Bank Transaction Code combinations - dated 24 June 2009
Requests for updates to External Code Sets (addition of a new code value, clarification of an existing definition, deactivation of an existing code value) must be submitted to the ISO 20022 RA, using the "Change Request for update of an External Code Set" template.
Change requests received by end of March, end of June, end of September and end of December are evaluated on a quarterly basis and approved updates are published respectively by end of May, end of August,end of November and end of February.