You pointed your finger on a “vitally important” area
I think maybe these IfcPreDefinedPropertySet entities were for “examining an idea”
The idea was/is something like what I introduced as Globalized References and Design Transfers [Here]
A good program/project/standard should support:
- Convergence (Standardization) --> IfcPreDefinedXs, etc
- Divergence (Non-Standardization) --> Templates, Psets, etc
The idea behind the GRVs & GDTs is Convergence & Divergence too
If we look at IFC schema, we recognize that it has developed from old CAD days and mainly is a 2D based approach: IfcDoorLiningProperties
I propose an alternative idea as a 3D approach
A GRV is a standard 3D context which is a reference to develop a lot of GDTs
buildingSMART International in ProductPass (a reserved .org domain) extension develops a standard 3D Building Information Model for a Door as GRV and manufacturers can use this as a reference to develop their own Door Products and add those Standard Doors in ProductPass Data/Information bank
Then AECOO companies just need to search the product bank, find appropriate brand and door they need and add it to their local information system
P.S: Some content creator companies like NBS, BIMobject, etc can develop these product contents as partners of this open organization