xdmp.weekFromDate( $arg as Date? ) as Number?
Returns an xs:integer between 1 and 53, both inclusive, representing the week value in the localized value of $arg.
If $arg is the empty sequence, returns the empty sequence.
|$arg||The date whose weeks of the year will be returned.|
xdmp.weekFromDate(xs.date("2012-05-16")) => 20
xdmp.weekFromDate(xs.date("2000-01-01")) => 52