ISO/TC 154

JWG 1 (with UN/ECE) group


JWG 1 was established in the late 80’s as so called “Joint Syntax Working Group (JSWG)” with the UN/ECE in order to develop and maintain the EDIFACT syntax. Since the publication of the syntax version 1 in 1988 the standard has been revised and amended several times until the current version 4, release 1. With its publication in 2002 the work in JWG 1 is mainly concentrated on the twice-per-year update of the syntax codes directory (in alignment with the EDIFACT user directories) on the corresponding JSWG website.

Please see Syntax Data Maintenance Request Submission and Processing Procedures (SDMR) for SDMR procedures.


The scope of JWG1 also includes the maintenance, update and extend of ISO 9735.


The Joint Working Group 1, formally known as Joint Syntax Working Group (JSWG), started its work in the late 80s to produce the so called version 1 of the EDIFACT syntax (published by ISO as ISO 9735:1988). The membership comprises experts from both UN/ECE and ISO level.


Current secretariat

Bernd Bösler (DE/DIN) (1998 - )

Previous secretariats

  • Peter Wilson (UK) (initial - 1998)


Current convenor

Sue Probert (BSI, United Kingdom) (2018 - )

Previous convenors

  • Don Trafford (UK) (initial - September 2007) (In memory please see

  • Klaus-Dieter Naujok (DE) (September 2007 - 2018)


JWG 1’s main deliverable is the ISO 9735, EDIFACT – Application level syntax rules, with the following versions:

  • Version 4, Release 1 – 2002 consisting of:

    • Part 1: Syntax rules common to all parts

    • Part 2: Syntax rules specific for batch EDI

    • Part 3: Syntax rules specific for interactive EDI

    • Part 4: Syntax and service report message for batch EDI (message type – CONTRL)

    • Part 5: Security rules for batch EDI (authenticity, integrity and non-repudiation of origin)

    • Part 6: Secure authentication and acknowledgement message (message type – AUTACK)

    • Part 7: Security rules for batch EDI (confidentiality)

    • Part 8: Associated data in EDI

    • Part 9: Security key and certificate management message (message type – KEYMAN)

    • Part 10: Syntax service directories

  • Version 4 – 1998/1999 with:

    • additional batch EDI features;

    • inclusion of ideographic character sets;

    • inclusion of the syntax directories;

    • inclusion of interactive EDI;

    • inclusion of CONTRL message type;

    • inclusion of security structures;

    • inclusion of security message types (AUTACK, KEYMAN);

    • inclusion of multi format EDI (non-EDIFACT data);

    • alignment of data field regarding the Y2K issue; and

    • inclusion of a technique to avoid segment collisions;

  • Version 3 – 1992 with additional character sets (UNOC to UNOF);

  • Version 2 – 1990 with minor changes to segments UNG and UNH;

  • Version 1 – 1988;

Since the last publication in 2002 the JWG 1’s work is concentrated on the maintenance of the service codes in process. Appropriate requests (DMRs) are handled by the group who is responsible for updating the UNSL (Syntax directories) and JSWG homepage accordingly. According to a JWG 1 agreement (2010-10-23) the “2-per-year” update of the Service Code Lists will be performed in alignment with the updates of the corresponding UN/EDIFACT directories.