Software Architect's Handbook

Cross-cutting concerns

In a software system, a concern is a grouping of logic or functionality that the application is providing. The concerns of the system reflect the requirements. When designing a system, software architects should seek to follow the Separation of Concerns (SoC) principle, which was described in Chapter 6, Software Development Principles and Practices. It is a design principle that seeks to reduce complexity by dividing the software system so that concerns are kept separate.

There are two main types of concerns in a software system:

• Core concern: It represents functionality that is fundamental to the system and is a primary reason as to why the software is being written. For example, the logic related to the calculation ...