Retrieves an object from which mappings between parameter definitions and categories can be found. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Remarks
 Returns a mapping between parameter definitions and parameter bindings. New bindings can be added to the Revit Document by using this object. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions InvalidOperationException | When the document is a family document. |