Overview
ISO 9735-10:2022 specifies the syntax service directories used across the ISO 9735 series for Electronic Data Interchange for Administration, Commerce and Transport (EDIFACT). Published as Part 10 of the EDIFACT application-level syntax rules (Syntax version number: 4, Syntax release number: 3), this document catalogs the service segments, composite and simple data elements, and syntax service code lists that support EDIFACT message structure and validation. It is part of the UN Trade Data Interchange Directory (UNTDID) and is intended for use wherever EDIFACT syntax rules are implemented.
Key Topics
- Scope and conformance
- Defines the service directories that apply to all parts of ISO 9735.
- Specifies use of Syntax version number = 4 and Syntax release number = 02 in interchange headers, and provides historic mapping of earlier syntax version numbers.
- Requires conformance with ISO 9735-1 through ISO 9735-9 where applicable.
- Service segment directory
- Includes a service segment specification legend (function, position, tag conventions, name, status, repetition, representations).
- Provides indices by tag and by name for all service segments (tags for segments start with “U”).
- Contains full service segment specifications and change indicators for maintenance (add/amend/delete).
- Service composite and simple data element directories
- Composite data element tags begin with “S”; simple data element tags begin with “0”.
- Each directory provides legends, dependency note identifiers (D1–D7), indices by tag/name, and element specifications.
- Syntax service code list directory
- Code lists used by the syntax service directories are referenced and an informative annex gives an overview (Annex A refers to external sources for full code lists).
- Dependency and representation rules
- Dependency note identifiers (D1–D7) and data representation codes (a, n, an, fixed/variable lengths) are documented for consistent parsing and validation.
Applications
ISO 9735-10:2022 is used by:
- EDI implementers and system integrators building or validating EDIFACT message processors.
- Software vendors of EDI translation engines, message validators and mapping tools.
- Trading partners, logistics and transport providers, customs and government agencies that exchange EDIFACT messages.
- Standards committees and implementers maintaining UNTDID-compliant message sets.
Practical uses include ensuring consistent segment and data element definitions across messages, supporting automated validation, and guiding message design and mapping between internal data models and EDIFACT syntax.
Related Standards
- ISO 9735-1 to ISO 9735-9 (application-level syntax rules common and specific parts)
- UN Trade Data Interchange Directory (UNTDID) for message design guidelines and additional directories
Keywords: ISO 9735-10, EDIFACT, syntax service directories, EDI, UNTDID, syntax rules, service segments, data elements.