On 12th Nov 2022 had a session with some linkedin folks
CGI - MP - Common Global Implementation - Market Practice group
Syntax and Semantics

Links:

Linked In :   / santosh-rajagopalan  
Multilateral Clearing : https://www.paiementor.com//clearing-...
Settlement : https://www.paiementor.com/clearing-a...
Payment System Models: https://www.paiementor.com/payment-sy...
Payment Engines: https://www.paymentsdomain.com/2021/0...
Parties : https://www.paymentsdomain.com/2021/0...
Payment Messages: https://www.paymentsdomain.com/2021/0...
Direct Debits: https://www.paiementor.com/category/d...
Cross border payment: https://www.paiementor.com/category/x...
Payments Accounting : https://www.paymentsdomain.com/2021/0...
SEPA : https://www.paymentsdomain.com/catego...
SWIFT : https://www.paymentsdomain.com/catego...
ISO20022 Official site : https://www.iso20022.org/
SWIFT MX: https://www2.swift.com/knowledgecentr...
ISO20022 Tutorial: https://corporates.db.com/in-focus/Fo...
Sharp Talents Course : https://sharptalents.com/course/payme...
Citi ISO20022 Mini Series : https://www.citibank.com/tts/sa/flipp...
ISO20022 for Dummies (e book): https://www.swift.com/campaign/iso-20...
MT to MX mapping (Old rough guideline for reference only) : https://www.bundesbank.de/resource/bl...