UNECE - UN/EDIFACT Directories 2011–Present (with syntax explanation/reference - latest version D.19B) UN/EDIFACT Rules - Covers syntax, implementation, and message design. UN/EDIFACT Syntax (ISO 9735, latest version) - Explains EDIFACT syntax in detail. DFDL schemas for UN/EDIFACT Data Format Description Language schemas for parsing and writing UN/EDIFACT interchanges UN/EDIFACT JSON Models Interactive UN/EDIFACT JSON models for parsing, generating, and validating UN/EDIFACT interchanges Electronic data interchange