Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition

11.10. NextGen POS Domain Model Associations

We can now add associations to our POS domain model. We should add those associations which the requirements (for example, use cases) suggest or imply a need to remember, or which otherwise are strongly suggested in our perception of the problem domain. When tackling a new problem, the common categories of associations presented earlier should be reviewed and considered, as they represent many of the relevant associations that typically need to be recorded.

Unforgettable Relationships in the Store

The following sample of associations is justified in terms of a need-to-know. It is based on the use cases currently under consideration.

Register Records Sale

To know the current sale, generate a total, print ...