An example of UML 2.5 component diagram for online shopping. The diagram shows "white-box" view of the internal structure of three related subsystems - WebStore, Warehouses, and Accounting. In UML ...

I expect component diagrams to be (usually) read from left to right, i.e. I expect the components and ports to be placed in such a way that in-ports are placed on the left border of a component and ...