Please write that blog post if you can! It's such an interesting part of the industry imo but there's basically ~ public documentation or discussions about it.
Related - I gave a talk a couple of weeks ago about banking interchange formats, which is related to all of this. The slides are here (top one) and the recording of the talk (which I will link) should appear soon: https://leejo.github.io/code/
Related - I gave a talk a couple of weeks ago about banking interchange formats, which is related to all of this. The slides are here (top one) and the recording of the talk (which I will link) should appear soon: https://leejo.github.io/code/