[Zope] Traversable DTML methods

It seems strange to me that SQLMethods are traversable out of the box and "normal" DTML methods are not. It seems to me that traversable DTML methods would be useful (to me this means DTML Methods with parameters). Is this something that might make it into Zope in the future or am I missing something important which means that they simply arn't necessary? - Ian Sparks.