Yes, it is Electronic Data Interchange. What you did may have been called EDI, but it wasn't. Each industry has it's own EDI format, but it must follow some specific standards.

http://www.x12.org/x12org/about/faqs.cfm#a1
http://www.trans-enterprise.com/technology/papers/intro-edi.pdf

>That is interesting.
>
>I thought that EDI was an acronym for Electronic Data Interchange and referred to the process of copying large datasets between two systems. I've worked on what has been called 'EDI' and the data was in different formats.
>
>Is it a reference to a holdover tape format - EBCIDIC and whatnot?