[Zope] Help: PATH_INFO==>object

[Li Dongfeng]

I am writing a service for other pages to
use as form action. How can I reference
the caller object in DTML/python?

I can only think of this: First use PARENTS[-1]
to get to the root object of the site.
Then split the PATH_INFO containing the caller's
path, and go down from the root to every subfolder
in PATH_INFO and then get to the caller object.
But this is not very elegant.

Can anyone give better solution to this?