generic
      pragma Warnings (Off, "declaration of ""<"" hides predefined operator");
      with function "<" (Left, Right : Element) return Boolean is <>;
      pragma Warnings (On,  "declaration of ""<"" hides predefined operator");

   package MinMax is

function Min 
(
New_Reading
: Element) return Element;

function Max 
(
New_Reading
: Element) return Element;

function Min                         return Element;

function Max                         return Element;