xml docs from rr

[Meitnik at aol.com]

from docs:
Example Code
--------------
on revStartXMLTree -- prepare a stack to hold a data subset
   ask "Get XML data for which publisher?" --[this i get
   if it is empty then exit to top -- stop parsing --[this i get
   set the currPublisher of this stack to myPublisher -- store value --[this 
i dont get
   clone stack "Subtree" of this stack -- new stack to hold data subset 
--[this i dont get
end revStartXMLTree

this does not make sense to me, is this correct, or missing some info here??? 
Help.

Andrew