Once you know the tree, edi is trivial to parse. You can even do it with a loop and a state to store which level has which tag and what the current count is.

The real challenge was to discover what the tree was. Like wayfair order listings, cargo delivery messages, which are also similar to how Rhenus does them. Every vendor has their own format and standards.

For anyone who's encountered this, you likely have access to these but either they are being sent to random email alias at your company or you need to request these (clearinghouses typically have this, but you can also request from the vendor/partner). I'll never forget how _angry_ I was to find out after finishing a project that there was a spec with everything I needed and nobody had bothered to send it to me while I was implementing the project.