EXPRESS Language Foundation Specifications

This document is available in its rendered forms here:

• EXPRESS Language Foundation

Introduction

This repository contains official specifications maintained by the EXPRESS Language Foundation (ELF). The EXPRESS Language Foundation facilitates the education, standardization, research, promotion, definition, and usage of information modelling and programming languages, with a focus on the EXPRESS language family.

The specifications include:

5001

Annotated EXPRESS — Specification for documenting EXPRESS models with structured annotations

5002

EXPRESS language pretty print format — Specification for standardized formatting of EXPRESS language constructs

5003

EXPRESS documentation migration — Specification for migrating EXPRESS documentation to the new format

5004

EXPRESS schema manifest — Specification for creating a manifest of EXPRESS schemas

5005

EXPRESS changes — Specification for documenting changes to the EXPRESS language and its specifications

These specifications are written in Metanorma to generate standardized documentation in multiple formats.

Structure

sources/

source files for EXPRESS specifications in Metanorma format.

sources/annotated-express/

Annotated EXPRESS specification

sources/express-pretty/

EXPRESS language pretty print format specification

sources/expressdocs-migration/

Migration of EXPRESS documentation to EXPRESSdocs

sources/express-schema-manifest/

EXPRESS schema manifest specification

sources/express-changes/

EXPRESS changes specification

Building documentation

This repository uses Metanorma to build standardized documentation.

Installing build tools

See https://www.metanorma.org/install/ for detailed installation instructions.

Building locally

If you have Metanorma installed locally, run:

metanorma site generate

Building with Docker

If you prefer using Docker, run:

docker run -v "$(pwd)":/metanorma -w /metanorma -it metanorma/mn metanorma site generate

Generated Formats

The build process generates documentation in multiple formats:

• HTML — Web-friendly format with navigation

• PDF — Print-ready format

• XML — Machine-readable format

• RXL — Relaton XML bibliographic format

License

Copyright EXPRESS Language Foundation.