A handle representing an item in an IFC file. 
   Namespace:   Autodesk.Revit.DB.IFC  
  Assembly:   RevitAPIIFC  (in RevitAPIIFC.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
Syntax
| C# | 
|---|
|  | 
| Visual Basic | 
|---|
|  | 
| Visual C++ | 
|---|
|  | 
Remarks
 Handles are used to populate each line item in an IFC file. Each handle is assigned a unique identifier (an integer) which can be seen in the file contents at the start of the line.