From: Bowyer, Alex
>I want to count how many objects are contained in the current container
>object and then do something with that value, but I can't do the bit I 
>need to do at the point of reading the count variable because I am in 
>the wrong namespace.
I would try and do it like this (untested):
<dtml-call "REQUEST.set('itemCount', len(objectIds()))">
Regards
    Max M