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(:Test: hours-from-dateTime-9                            :)
(:Written By: Carmelo Montanez                           :)
(:Date: June 6, 2005                                     :)
(:Purpose: Evaluates The "hours-from-dateTime" function  :)
(:as part of a "-" expression.                           :) 
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fn:hours-from-dateTime(xs:dateTime("1970-01-01T00:00:00Z")) - fn:hours-from-dateTime(xs:dateTime("1970-01-01T10:00:00Z"))