A handle representing an item in an IFC file. 
Namespace: Autodesk.Revit.DB.IFC
Assembly: RevitAPIIFC (in RevitAPIIFC.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2012 
Syntax
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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. 
Inheritance Hierarchy
SystemObject
Autodesk.Revit.DB.IFCIFCAnyHandle
Autodesk.Revit.DB.IFCIFCAnyHandle