# fn:hours-from-duration - XPath XQuery Reference

Returns the number of hours in a duration.deterministiccontext-independentfocus-independentIf $arg is the empty sequence, the function returns the empty sequence.Otherwise, the function returns an xs:integer representing the hours
            component in the value of $arg. Given that a duration
               is a ($months, $seconds) tuple, the result is the value of ($seconds mod 86400) idiv 3600.If $arg is a negative duration then the result will be negative.If $arg is an xs:yearMonthDuration the function returns 0.fn:hours-from-duration(xs:dayTimeDuration("P3DT10H"))10fn:hours-from-duration(xs:dayTimeDuration("P3DT12H32M12S"))12fn:hours-from-duration(xs:dayTimeDuration("PT123H"))3fn:hours-from-duration(xs:dayTimeDuration("-P3DT10H"))-10