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Part 4. EDIFACT Rules for Electronic Data Interchange for Administration, Commerce and Transport

Chapter 1. Introduction
Chapter 2. General Information

2.1 Establishment of United Nations Standard Message types (UNSMs)
2.2 UN/EDIFACT syntax rules (ISO 9735-latest version)

Annex A. Definitions
Annex B. Service Segments Specifications
Annex C. Order of Segments and groups of Segments within a Message

2.3 UN/EDIFACT syntax implementation guidelines
2.4 UN/EDIFACT message design guidelines
2.5 Version/release
2.6 General introduction to UNSM descriptions