User Interaction and Interface Design with UML: Purchase GUI
Class diagram Version 1
Online shopping UML activity diagram example - customer can browse or search items, view specific item, add it to shopping cart, view and update shopping cart, checkout.
Class Diagrams | Niedermayer.ca
class diagram - UML Domain Model of Web Shop - Stack Overflow
UML component diagram example for online shopping - search engine, shopping cart, inventory, customers, orders.