[Zope-CMF] Question About Acquisition.Implicit

[George Lee]

In

http://www.zope.org/Documentation/Books/ZDG/current/Acquisition.stx

the examples of acquisition it gives involve classes that subclass
Acquisition.Implicit or Acquisition.Explicit

>From what I can tell from the epydoc documentation of many Zope
classes (e.g. PortalFolder), they do not subclass either Implicit or
Explicit. How is it then that they acquire attributes from their
containers and contexts?

Peace,
George