(:*******************************************************:)
(:Test: op-subtract-times-4                              :)
(:Written By: Carmelo Montanez                           :)
(:Date: June 27, 2005                                    :)
(:Purpose: Evaluates The "subtract-times" function that  :)
(:return true and used together with fn:not.             :)
(: Uses the "fn:string" function to account for new EBV rules. :)
(:*******************************************************:)
 
fn:not(fn:string(xs:time("13:00:00Z") - xs:time("14:00:00Z")))