subtract-datesdateTimes...

subtract-dates/dateTimes...

This entry covers four related functions: subtract-dates-yielding-yearMonthDuration() , subtract-dates-yielding-dayTimeDuration() , subtract-dateTimes-yielding-year MonthDuration() , and subtract-dateTimes-yielding-dayTimeDuration() . All three functions return the duration that separates one date or dateTime from another. If the first argument is chronologically earlier than the second argument, the result is a negative duration. For example, «subtract-dates-yielding-dayTimeDuration(xs:date('2004-06-01'), xs:date('2004-05-01')) » returns the duration P31D .

Argument	Data Type	Meaning
end-point	xs:date or xs:dateTime	The end point of an interval
start-point	xs:date or xs:dateTime	The start point of the interval
Result	xdt:dayTimeDuration or xdt:yearMonthDuration	The duration between the start point and the end point of the interval