Tuple types

[Pavel Minaev]

On Tue, Sep 1, 2009 at 6:44 AM, John Snelson<http://x-query.com/mailman/listinfo/talk> wrote:
> Tuple types won't make it into XQuery 1.1, but the closures support in
> higher order functions allows you to effectively return sequences of
> sequences:
>
> (: Wrap a sequence as a function item :)
> declare function local:ref($arg as item()*) as function() as item()*
> {
>    function() { $arg }
> };
>
> (: Unwrap a sequence from a function item :)
> declare function local:deref($arg as function() as item()*) as item()*
> {
>    $arg()
> };

This makes sense, though it would be a nuisance to have to define
ref() and deref() every time. Is there any consideration to make them
standard library functions?