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Ifc-Factory Wiki

Welcome to the Ifc-Factory documentation — a pure TypeScript IFC4X3 ADD2 library for parsing, writing, and manipulating IFC (Industry Foundation Classes) data.

Overview

Ifc-Factory is a lightweight alternative to IfcOpenShell and web-ifc, focused on data operations rather than geometry processing. It provides:

• Full IFC4X3 ADD2 schema support (auto-generated from official EXPRESS)
• STEP file I/O (ISO 10303-21)
• Spatial structure management
• Property sets and quantity sets
• Documents, libraries, and classifications
• 2D annotations
• Dutch compliance (BBL, BENG, Aerius)
• Fluent query API
• Zero dependencies — pure TypeScript

Table of Contents

Getting Started

• Getting Started — Installation, requirements, and first examples
• Tutorials — Step-by-step walkthroughs for common tasks

Architecture & Concepts

• Architecture — Package layers, two-pass parsing, entity storage
• IFC Concepts — IFC schema basics for developers new to BIM
• STEP File Format — ISO 10303-21 physical file format explained

Package Documentation

• Package Reference — Overview of all 7 packages
  • express-parser — EXPRESS schema (.exp) parser
  • step-serializer — STEP file I/O
  • codegen — TypeScript code generator
  • schema — Generated IFC4X3 types
  • step-parser — Schema-aware STEP parser
  • core — Main library (IfcModel, helpers, compliance)
  • ifc-utils — Convenience utilities

API & Reference

• API Reference — Complete function and class reference
• Query API — Fluent query builder documentation
• Dutch Compliance — BBL, BENG, Aerius property sets

Development

• Contributing — Setup, build, test, code style
• Changelog — Version history