How does IFC work with existing classification systems such as Omniclass, Uniformat, etc?

I didn’t know there’s an interesting discussion around classifications

Thank you all, especially @stefkeB who explained the issues very well

As we know each classification has developed based on an specific purpose, and the majority of them are just focused on the “construction” phase, some on Project Management side, some on Resource Management side

And I liked this part a lot:

This is often problematic in BIM software: you can classify an Element/Product/Object and a Space, but often not the Material and I know of no examples where you can actually classify e.g. layers in a wall. It may work with BuildingElementParts as they behave as other Elements.

I think this part even approves my approach in MaterialPass, (even ProductPass and FacilityPass):

These days I see some software have started to focus more on classification issues, especially multi-classifications which is good