[Zope] Unauthorized vs. Unauthorized vs. Unauthorized

Which Unauthorized exception should I use in my own code? I see the following three imports in other zope code : from AccessControl import Unauthorized from AccessControl.unauthorized import Unauthorized from zExceptions import Unauthorized What is the difference between these? TIA, -D -- "GUIs normally make it simple to accomplish simple actions and impossible to accomplish complex actions." --Doug Gwyn (22/Jun/91 in comp.unix.wizards) www: http://dman13.dyndns.org/~dman/ jabber: dman@dman13.dyndns.org