Try adding something like this in your render method (haven't tried this, but from a poking around the code in the DocumentTemplate directory in the past this seems about right): import VSEval expr = VSEval.Eval(variable_you_want_to_evaluate) value = expr.eval(md) -Randy

-----Original Message----- From: Romain Slootmaekers [mailto:romain@zzict.com]

I'm trying to create a custom dtml tag, and after the How-to on this (http://www.zope.org/Members/z113/1) that in itself posed no problem: easy as pie. The problem I'm having with the tag is that parameters are not evaluated. for instance (my tag's name is 'aa')