XML.com FAQs > D. Developers and Implementors (including WebMasters and server operators)
Question:  D.16 What's the story on XML and EDI?
Answer:

Electronic Data Interchange has been used in e-commerce for many years to exchange documents between commercial partners to a transaction. It has required special proprietary software, but there are now moves to enable EDI documents to travel inside XML. Details of developments are at http://www.xmledi.com/ and there is a guideline document at http://www.geocities.com/WallStreet/Floor/5815/guide.htm.

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This FAQ is from The XML FAQ, maintained by Peter Flynn