||extended coordination view
||23. May 2007
||ISG meeting in Helsinki
|summary||agreement on having maximum of one instance of IfcSite
An IFC exchange file conforming to the coordination view shall only have either:
- no instance of IfcSite, then the IfcBuilding is then the uppermost entity within the spatial structure
- exactly one instance of IfcSite
two or more instances of IfcSite are not supported within the coordination view.