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ifcos-impl-creation

Generate valid IFC models from scratch using IfcOpenShell API workflows.

30|4|Updated Mar 5, 2026
Search Tags:#ifcopenshell#ifc4#ifc2x3#property sets#bim model generation#spatial containment#geometry placement
One-click install
npx skills add https://github.com/Impertio-Studio/Blender-Bonsai-ifcOpenshell-Sverchok-Claude-Skill-Package --skill ifcos-impl-creation-impertio-studio
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: ifcos-impl-creation
Source: https://github.com/Impertio-Studio/Blender-Bonsai-ifcOpenshell-Sverchok-Claude-Skill-Package/tree/main/skills/ifcopenshell/impl/ifcos-impl-creation
Command: npx skills add https://github.com/Impertio-Studio/Blender-Bonsai-ifcOpenshell-Sverchok-Claude-Skill-Package --skill ifcos-impl-creation-impertio-studio

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

It eliminates common IFC creation failures when building a model from scratch, including missing IfcOwnerHistory (IFC2X3) and broken spatial containment that makes elements invisible in BIM viewers.

Core Features & Use Cases

  • End-to-end IFC creation workflow: guides a complete build sequence from IFC file + IfcProject through contexts, spatial hierarchy (Site/Building/Storey), element creation, and final write-out.
  • Schema-safe entity creation: enforces using ifcopenshell.api.run() patterns so GlobalIds, OwnerHistory, and validation behavior are handled correctly.
  • Production-grade guardrails: calls out critical ordering requirements (contexts before geometry, hierarchy before elements, units assignment, placement assignment, and correct type-to-occurrence mapping).
  • Typical BIM authoring tasks: create IFC4/IFC2X3 projects, add walls/slabs/columns, define property sets, set up types, and generate door/window openings.

Quick Start

Use this skill to generate a new IFC4 model from scratch by running an ifcopenshell.api workflow that creates Project → Site → Building → Storey, then creates a wall with representation, placement, spatial containment, optional properties, and writes the file.

Frequently Asked Questions about ifcos-impl-creation

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I create a valid IFC model from scratch using IfcOpenShell?▼

To create a valid IFC model from scratch, use IfcOpenShell API workflows like `ifcopenshell.api.run("project.create_file")` to orchestrate project setup, spatial hierarchy, geometry, and property assignments. This ensures GlobalIds and validation are handled correctly.

Why are my IFC2X3 elements invisible in BIM viewers after generation?▼

Elements become invisible in BIM viewers due to missing IfcOwnerHistory in IFC2X3 or broken spatial containment. Use correct API-driven creation patterns to assign owner history and spatial containers before writing the file.

What is the correct order for building spatial hierarchy in an IFC file?▼

The correct order for building IFC spatial hierarchy is creating contexts before geometry, establishing the Site/Building/Storey hierarchy before elements, and assigning units, placement, and spatial containment to ensure valid model generation.

Can I use IfcOpenShell to generate both IFC4 and IFC2X3 projects?▼

Yes, you can generate both IFC4 and IFC2X3 projects. The workflow accommodates both schemas, though IFC2X3 requires specific owner history handling to prevent validation errors and missing element visibility.

How do I add property sets and types to walls in an IFC model?▼

Add property sets and types to walls by defining type-to-occurrence mappings and using IfcOpenShell API assignments. This ensures walls, slabs, and columns receive correct representations, placements, and optional properties.

What are common limitations when generating IFC models programmatically?▼

Common limitations include incorrect creation ordering causing validation failures, missing IfcOwnerHistory for IFC2X3, and broken spatial containment. Enforcing API-driven patterns for contexts, hierarchy, and placement prevents these generation errors.

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