These implementation guidelines (IGs) set out the Euro One Leg Out (EOLO) rules for implementing the Inter-Payment Service Provider (Inter-PSP) ISO 20022 XML message standards based on version 1.1 of the 2023 One-Leg Out Instant Credit Transfer (OCT Inst) rulebook, which enters into force on 28 November 2023 at 08:00 CET.
Two distinct sets of OCT Inst Inter-PSP IGs are available: one set for incoming OCT Inst transactions and a second set for outgoing OCT Inst transactions.
EOLO XML Schema Definitions (XSDs) related to the aforementioned IGs are also made available (note: XSD files can be opened via a text editor (e.g. Microsoft Notepad) or XML Schema editor).
Disclaimer:
EOLO XSDs are not developed for ‘production’ purposes, they are to instantiate the business rules and restrictions contained in the IGs in a formal interchange format, sometimes referred to as Technical Validation Subsets (TVSs). Production instantiations should refer to the default ISO 20022 namespaces.