[Zope] Getting named variables passed to DTML callable

If there a simple way to get at the kw dict passed to a DTML callable? I need to be able to determine if a variable was passed specifically from something like... container.DTMLMethod(context, context.REQUEST, variable='Hello World') In the DTML Method I can use <dtml-var variable> but if this variable was also the name of an id in the ZODB then it'll find it there. Basically I need the equiv of <dtml-with kw only><dtml-var variable></dtml-with> ideally available as something like <dtml-var "this().kw"> or something Thanks Phill