Call a function to updated a database entry.
An UpdatingFunction represents the invocation of an updating
function, together with the provided argument expression list. The
QName must match the name of an updating function that is declared
in the current update statement or in an imported module. The number of
argument expressions must match the number of arguments in the declared
function signature.
An updating function can only be invoked from within an update expression. It does not return a function value, rather it results in a sequence of update operations being applied to the database.
For each book element, invoke the function y:set-year:
import module namespace y="Y"; update for $book in input()/bib/book do Y:set-year($book)
The following construct(s) refer to this construct:
