The Area being Modelled is :-
e-Commerce Customers, Products, Orders and Shipments.

A. DESIGN NOTES :
A.1 A Product Hierarchy has been assumed, where each Product has just one Parent Product.

B. The Things of Interest, ('THINGS'), include :-
B.1 Customers
B.2 Orders.
B.3 Payment Methods
B.4 Products.
B.5 Shipments

C. These THINGS are Related as follows :-
C.1 A CUSTOMER can have one and only one ADDRESS. 

The Shipping Address will always be the Billing Address,

If a Credit Card is used for Payment, then  the address on the Credit Card will
also be the Shipping Address.
C.2 A CUSTOMER can place zero, one or many ORDERS.
C.3 A CUSTOMER can have one or many PAYMENT_METHODS.
C.4 Each ORDER can involve one or many PRODUCTS.
C.5 Each ORDER can involve one or many SHIPMENTS.

D. Other Characteristics of these THINGS include :-
D.1 A CUSTOMER has a GENDER, which is validated against a table of valid GENDER_CODES.

E. Sample Data includes :-
E.1 To be determined

F. Typical Enquiries include :-
F.1 To be Determined