ISO 9735-11:2022

Overview

ISO 9735-11:2022 defines a Version 3 compatible profile for Version 4 of ISO 9735 (EDIFACT). Its purpose is to provide profiling rules that let organizations migrate from EDIFACT syntax version 3 (ISO 9735:1988 / Amd.1:1992) to syntax version 4 (ISO 9735:1998) with minimum effort and cost. The document scopes the syntax restrictions, conformance requirements and implementation guidance needed to preserve backward compatibility while adopting the newer syntax release.

Key topics and technical requirements

• Profiling rules: Defines which parts of ISO 9735-1 to ISO 9735-9 are restricted or allowed to remain compatible with version 3. Rules are numbered (Rule 1 to Rule 15) and specify allowed/forbidden features.
• Conformance identifiers: Mandates using Syntax version number = “4” (data element 0002) and Syntax release number = “01” (data element 0076) in the UNB interchange header for conformant interchanges.
• Syntax restrictions (notable rules):
  • Rule 1: Repeating data elements (the repetition service character) are not allowed.
  • Rule 2: Dependency notes (message/segment/composite dependency constructs) are not allowed.
  • Rule 3: UNB, UNG and UNH segments are modified - follow Annex A implementation rules.
  • Rule 4: Only character sets UNOA–UNOF are allowed; UNOW is permissible only with partner agreement and restrictions.
  • Rule 5: New version‑4 service segments UGH/UGT are not allowed.
  • Rules 6–15: Restrict version‑4-only features (certain batch messages, interactive EDI messages, advanced security, AUTACK, KEYMAN, associated data, confidentiality) - these are not permitted in the compatibility profile.
• Annex A (normative): Lists permissible service segments (UNA, UNB, etc.) and detailed implementation rules to ensure compatibility with version 3 service segment usage.

Applications and users

Who benefits:

• EDI implementers and integrators planning an EDIFACT migration from version 3 to version 4.
• IT teams and trading partners seeking interoperability while minimizing rework and cost.
• Legal, compliance, and operations teams that require controlled adoption (e.g., where advanced security features are deferred). Practical uses:
• Establishing interchange agreements that reference the compatibility profile.
• Updating EDI translators and gateways to emit Syntax version “4” while honoring version‑3 restrictions.
• Phased rollouts where advanced version‑4 capabilities (interactive messaging, security services) are adopted later.

Related standards

• ISO 9735-1 to ISO 9735-9 (syntax rules and parts referenced)
• ISO 9735-10 (syntax service directories) - conformance to ISO 9735-1, -2 and -10 is required when using this profile.

Keywords: ISO 9735-11:2022, EDIFACT, electronic data interchange, syntax rules, Version 3 compatible profile, EDIFACT migration, UNB, UNA, service segments, conformance.