[Zope] Acquisition and/or Traversal ?

[D2]

Needing a starting point to understand how traversal and acquisition 
work, would you give me some hints to solve the type of problem below ?

In this example company, a subsidiary must establish proposal based on a 
product list. If it doesn't have products, it must use the headquarter's 
ones.

1 with this hierarchy, how can i reach the Product list in the Products 
Folder from Proposal 1  of Subsidiary 1 ?

2 If Products weren't folder but objects and items weren't contained 
objects but properties of Products, would the solution be the same ?


Root/Headquarter
        |
        |-- Products (Folder)
        |       |
        |       |
        |       --- item 1 (objects)
        |       --- item 2     ''
        |       --- item 3     ''
        |       |
        |       |
        |       |-- Proposals (Folder)
        |            |
        |            |
        |            --- Proposal x (object)
        |
        |---Subsidiary 1----
        |                  |
        |                  |-- Products (Folder)
        |                      |
        |                       --- no objects
        |                       |
        |                       |
        |                       |-- Proposals (Folder)
        |                            |
        |                            |
        |                            --- Proposal 1 (object)
        v


-- 
Andre
PZP Enthusiast