Agreement on having maximum of one instance of IfcSite 

Based on          IFC2x3

Initiator            ISG Meeting-Helsinki

Effects              Extended Coordination View

Date                   2007 05 23


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. 

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