Dimitre Novatchev wrote:

> theFunc() will have a global variable that wraps all
> transformation.
> theFunc() will return nothing.

  More precisely, I think the point is to return nothing, *by using the
variable*.  For instance:

    <xsl:sequence select="$sink[not-exists]"/>

  Regards,

-- 
Florent Georges
http://www.fgeorges.org/