IFC Model Hierarchy

Note: By default, ARCHICAD assigns identical GlobalID attributes to the following entities: IFC Project, IFC Site, IFC Building, and IFC Story. More precisely, the Global IDs will be identical provided that the respective ID fields, defined at ARCHICAD’s Project Info dialog box (File > Info) contain identical keywords (or no value at all). However, you can alter these keywords in the Project Info dialog box to control whether the spatial entities have identical or different GlobalIDs.
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