A range of allowed values. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2014 
  Since:  2014 
Syntax
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Members
| Member name | Description | 
|---|---|
| NonNegative | Only non-negative values are allowed. A tolerance of 1.0e-9 is used, so very small negative numbers are accepted. | 
| All | All values are allowed. | 
| Positive | Only positive values are allowed. A tolerance of 1.0e-9 is used, so very small positive numbers are rejected. |