[Zope] Regarding retrieving parameters in DTML.

Hi, I am using Zope 2.5.1. I want to know whether it is possible to retrieve parameters passed through URL in DTML methods. For example, let us take this. I want to access test folder in my root directory of my Zope and want to pass a parameter to it. I am trying out the following URL for the same. http://mydomain.com/test?param=1. Is this URL correct? If so, how to retrieve the parameter in my DTML method? Expecting an earlier response. Thanks and regards, Paul.