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(:Test: op-subtract-times-1                              :)
(:Written By: Carmelo Montanez                           :)
(:Date: June 26, 2005                                    :)
(:Purpose: Evaluates The "subtract-times" function       :)
(:As per example 1 (for this function)of the F&O specs   :)
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xs:time("11:12:00Z") -  xs:time("04:00:00Z")