[Zope] Easy DTML question

Is there a predefined Zope variable to be used in DTML documents that contains the parameter part of a request. Say, the requested URL is http://somewhere:9674/folder1/folder2/object?param1=values1¶m2=value s2 The variable URL0 contains then http://somewhere:9674/folder1/folder2/object But is there any for the param1=values1¶m2=values2 part? I guess there's a Dictionary somewhere around, but I'm right now too busy to look for it. Thanks in advance Stefan