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(:Test: op-subtract-yearMonthDuration-from-dateTime-6    :)
(:Written By: Carmelo Montanez                           :)
(:date: July 5, 2005                                     :)
(:Purpose: Evaluates The "subtract-yearMonthDuration-from-dateTime" operator that :)
(:is used as an argument to the fn:number function.      :)
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fn:number(xs:dateTime("1988-01-28T13:45:23Z") - xs:yearMonthDuration("P09Y02M"))