The type of the GUID to be retrieved from Revit. 
   Namespace:   Autodesk.Revit.DB.IFC  
  Assembly:   RevitAPIIFC  (in RevitAPIIFC.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
| C# | 
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| Visual Basic | 
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| Visual C++ | 
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Members
| Member name | Description | 
|---|---|
| Project | The project GUID. | 
| Building | The building GUID. | 
| Site | The site GUID. |