I am trying to do:
    <map:redirect-to resource="xxx"/>
from within a nested sitemap, where "xxx" is
defined as a map:resource in a higher level sitemap
    <map:resource name="xxx">
I can invoke xxx without problems if it's defined in the same sitemap
in which the redirect is done. But not if the resource definition is
moved up the sitemap hierarchy.
Is this possible? How is the correct syntax to invoke
such a resource?