Name
uniformPDF — Defines a uniform (constant) probability density
    function
Content model
uniformPDF :  symmetric
     bounds+
Attributes
symmetric - 
	Indicates whether the boundaries are symmetric (+/-x) or
	asymmetric (+x to -y).
       (enumerated)
  
Description
      In a uniformly distributed random variable, the value of the
      parameter has equal likelihood of assuming any value within the
      (possibly asymmetric) bounds, which must bracket the nominal
      value (which is given elsewhere in the parent element).