Welcome to the CDM-IFC wiki!

Please remember that it is work in progress. Contributors are welcome.

Purpose

Set up the link between IFC, as a component of the CDM, with other CDM parts.

IFC: origin and evolution

An overview is provided by the Spanish chapter of buildingSMART International: https://www.buildingsmart.es/2024/12/03/the-evolution-of-ifc-the-path-to-ifc5/

IFC: source

We currently use an IfcOWL version of Industry Foundation Classes 4.3 ADD2. See the corresponding page in this wiki.

IFC links with the CDM

See this page, providing some explanations and adapter vocabularies.

Data serialization

The original IFC uses STEP, a text-based format. In its IfcOWL version, RDF is the obvious first answer. As IFC also handles geographic data, the question arises about using traditional geographic data formats such as WKT (Well-Known Text). Using WKT in conjunction with RDF is also being examined under the SemanticRSM developments.

For IFC-specific aspects of using WKT, see this page