[Zope] NEWBIE: DTML Appending string and passing in REQUEST?

[Chip Vanek]

Hi,,

Really simple question that I just cannot figure out.

I want to append items together and pass as form item to
another method in REQUEST.

Well I can create an empty string in REQUEST with
   <dtml-call "REQUEST.set('list', [])">

I can then iterate and fill the list fine.  
   <dtml-call "list.insert(0, id)">

Then I want the results of the list in one variable 
in another method.  i.e.:  I have a list 
 ['item1','item2','last item'] and I want a string like 
  "item1/item2/last item".

I know I can iterate through the list with dtml-in but what
is the right join syntax?  
 
   <dtml-call  _.string.join(list,' ')> doesn't get me anywere.

Thanks for your help

Chip