Technical work

Technical Committees

ELF's technical committees steward the EXPRESS language family and its ecosystem. Committees are open to all members, decide by consensus, and align their work with its standardization targets at ISO/TC 184/SC 4 and IEC.

TC EXPRESS

active

The EXPRESS modelling language: definition, maintenance and evolution (ISO 10303-11); schema lifecycle standards (schema manifest, changes model); language extensions — the EXPRESS mapping language and EXPRESS-Q; Annotated EXPRESS and pretty-print; the SUMA publication framework for ISO 10303 resources; and the open-source language toolchain (parser, validation, conformance).

Standardization: ISO/TC 184/SC 4 WG 11

TC EXPRESS-G

active

The EXPRESS-G graphical notation: definition, maintenance, and visualization practice.

Standardization: ISO/TC 184/SC 4 WG 12

TC EXPRESS-I

active

Implementation methods: the Part 21 exchange structure, Part 28 XML representation, SDAI language bindings, and data interchange practice.

Standardization: ISO/TC 184/SC 4 WG 21

TC OpenCDD

active

OpenCDD: EXPRESS schemas for the IEC Common Data Dictionary (IEC 61360 / IEC 62656), open model libraries, and supporting tooling.

Standardization: ISO/TC 184/SC 4 JWG 24 (with IEC)

TC Education

active

Education and community: tutorials, courses, modelling best practices, documentation, and user-community support.

Standardization: External outreach

Participate in a committee

All members may join any committee, propose new committees, and chair their work. How committees decide is described on the governance page.

Join ELF How we decide