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Clipping & CSG geometry concepts

I recently discovered two confusing notes in ifc4 html documentation. Is that supposed to mean that IfcBooleanClippingResult, IfcBooleanResult & IfcPrimitive3D are essentially deprecated (i.e. can be imported but should not be exported)? Isn’t that a bit conflicting with DTV idea? :thinking:

NOTE This representation type is predominately used for compatibility with previous releases of the standard.

NOTE The Items__IfcBooleanResult and IfcPrimitive3D shall also be allowed for compatibility with previous releases of the standard.