Revit spatial hierarchy

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The following attributes may be set on the IfcSite. If you have a Toposurface object overriding your IfcSite object representation as detailed in Revit Geolocation, the procedure is slightly different. Do not implement both procedures simultaneously. Note that in Revit, only a single IfcSite may exist. It is not possible to create multiple sites.

Attribute Name Required Procedure with Toposurface Procedure without Toposurface
Name Yes Create a new IfcName instance parameter, assigned to the Toposurface object. Create a new SiteName instance parameter, assigned to the Project Information object.
Description Create a new IfcDescription instance parameter, assigned to the Toposurface object. Create a new SiteDescription instance parameter, assigned to the Project Information object.
ObjectType Create a new IfcObjectType instance parameter, assigned to the Toposurface object. Create a new SiteObjectType instance parameter, assigned to the Project Information object.
LongName Yes Create a new IfcLongName instance parameter, assigned to the Toposurface object. Create a new SiteLongName instance parameter, assigned to the Project Information object.
LandTitleNumber Yes Create a new IfcLandTitleNumber instance parameter, assigned to the Toposurface object. Create a new SiteLandTitleNumber instance parameter, assigned to the Project Information object.

The following attributes may be set on the IfcBuilding. Note that in Revit, only a single IfcBuilding may exist. It is not possible to create multiple buildings.

Attribute Name Required Procedure
Name Yes Fill out the Building Name field in the Project Information dialog.
Description Create a new BuildingDescription instance parameter, assigned to the Project Information object.
ObjectType Create a new BuildingObjectType instance parameter, assigned to the Project Information object.
LongName Yes Create a new BuildingLongName instance parameter, assigned to the Project Information object.