Specifies a portion of an Analytical Element or the whole element. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Members
| Member name | Description | 
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| StartOrBase | Start or base of element (corresponds to end = 0). | 
| EndOrTop | End or top of element (corresponds to end = 1). | 
| Whole | Entire element |