Meaning of a subface's type. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
  Since:  2012 
Syntax
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Members
| Member name | Description | 
|---|---|
| Bottom | A horizontal face at the bottom of the room, as defined by the room's level and base offset, or a face of the room that is bounded below by a room-bounding element. | 
| Top | A horizontal top face of the room as defined by the room's level and height, or a face of the room that is bounded above by a room-bounding element. | 
| Side | Any face which does not meet the criteria to be Top or Bottom. |