I want to break down IFC and re-build it in another way
And I think the first step is: Develop a "classification based on IFC"
I’m practicing to find that can I control IFC tree schema with classification and reduce/clean the majority of general entities like IfcRoot, IfcObjectDefinition, IfcObject, …, etc?
About other classifications: If all other classifications have to come closer to support IFC, then why not develop classifications based on IFC from scratch?