A Double Range validator is typically used to validate that
the value of a component does not exceed the standard range
of the Java double
data type. This data type represents
a double floating-point number that ranges from ±439E-324
to ±1.7976931348623157E+308. Typically, the way you add
a validator to a JavaServer Faces component is to edit the component's
validator property, which provides a drop down list from which you can
select a validator.