fn.yearFromDate( $arg as Date? ) as Number?
Returns an xs:integer representing the year component in the localized value of $arg. The result may be negative.
If $arg is the empty sequence, returns the empty sequence.
|$arg||The date whose year component will be returned.|
fn.yearFromDate(xs.date("1999-05-31")) => 1999
fn.yearFromDate(xs.date("2000-01-01+05:00")) => 1999