UN/EDIFACT (the United Nations rules for Electronic Data Interchange for Administration, Commerce and Transport) comprise a set of internationally agreed standards, directories, and guidelines for the electronic interchange of structured data, between independent computerized information systems.
The UNEDIFACT rules are maintained and published in the UNTDID (United Nations Trade Data Interchange Directory), which includes:
Part 1. Introduction
Part 2. Uniform rules of conduct for interchange of trade data by teletransmission (UNCID)
Part 3. Terms and Definitions
Part 4. United Nations rules for electronic data interchange for administration, commerce and transport
Part 5. United Nations directories for electronic data interchange for administration, commerce and transport