The interface used to implement a Navisworks exporter. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2014 
Syntax
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Remarks
 Implement this interface and register an instance of the derived class with the Navisworks external service.