ZF-1598: Filter and Validator Configuration - Public Properties or Accessor Methods: Please Choose One
For consistency's sake, please choose between public properties (ala Zend_Validate_Alpha) or get/set accessor methods (ala Zend_Validate_Between) for validator configuration options. Having them both just causes confusion.
As a secondary request, if you decide to go with accessor methods, please consider adding a method that would get all configuration options in a single call (kind of like a getMessageVariables() for config options). This would make things like trying to prepare Zend_Validate_* instances for export as JSON much easier.