# op:add-dayTimeDuration-to-time - XPath XQuery Reference

Returns the xs:time value that is a given duration after a specified
               xs:time (or before, if the duration is negative or causes wrap-around
            past midnight)Defines the semantics of
         the "+" operator when applied to an xs:time and an
            xs:dayTimeDuration value.First, the days component in the canonical lexical representation of $arg2
            is set to zero (0) and the value of the resulting xs:dayTimeDuration is
            calculated. Alternatively, the value of $arg2 modulus 86,400 is used as the
            second argument. This value is added to the value of $arg1 converted to an
               xs:dateTime using a reference date such as 1972-12-31, and
            the time component of the result is returned. Note that the xs:time
            returned may occur in a following or preceding day and may be less than
               $arg1.The result has the same timezone as $arg1. If $arg1 has no
            timezone, the result has no timezone.op:add-dayTimeDuration-to-time(xs:time("11:12:00"),
                  xs:dayTimeDuration("P3DT1H15M"))xs:time("12:27:00")op:add-dayTimeDuration-to-time(xs:time("23:12:00+03:00"),
                  xs:dayTimeDuration("P1DT3H15M"))xs:time("02:27:00+03:00")That is, {0, 0, 0, 2, 27, 0, PT3H}