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buildingSMART / NextGen-IFC

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IfcZone and IfcSpatialZone #64

Closed I-Sokolov closed 4 years ago

I-Sokolov commented 4 years ago

Why do we have both IfcZone and IfcSpatialZone. It sounds confusing. If we need both documentation should be more clear what is the difference,

TLiebich commented 4 years ago

IfcZone (added in IFC1.0 - or around) is a special group (subtype of IfcGroup) to group spaces. But it did not allow having an own space representation (as often needed for zones), therefore IfcSpatialZone was added later (subtype of IfcSpatialElement). But I agree that we can rationalize this (also in light of the new "late binding" ideas).

I-Sokolov commented 4 years ago

Thomas, IfcRelServicesBuildings is deprecated in 4.3 but IfcZone is actual How to reference IfcZone to spatial structure element?

TLiebich commented 4 years ago

Igor, when developing IFC4.3, the functionality of IfcrelSevicesBuildings had been combined into IfcRelReferencedInSpatialStructure, so that any product or system can be referenced in a spatial structure, including the new ones for infrastructure.

see IfcRelReferencedInSpatialStructure

TLiebich commented 4 years ago

Hi Igor - one more comment - these are relevant questions, but would be better asked here: https://github.com/buildingSMART/IFC4.3.x-development