[Zope] Multiple selection property and Zcatalog

Hi, I did a Zclass which has a property called "connection" which I want to be a multiple selection property. How can I access to the value of this property ? If I put <dtml-var connection> I get a list but I can't access to one of the item of the list in particular. I tryed connection[1]... but I only get a char : connection is a string !!! How to index this property in a Zcatalog ? I want to be able to find an instance by quering on one item of this property. PLEASE HELP... _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.