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

Introduction

First, to set the expectation level, this is an introduction to the topic of logical architecture, a fairly large topic.

The prior iterations emphasized a strongly related group of “domain” software objects in the Design Model (such as Sale and Payment). No attention was paid to the user interface or access to resources such as a database. The motivation was to keep things simple and focus on core object design skills.

However, a typical system is composed of many logical packages, such as a user interface package, a database access package, and so forth. Each package groups a set of cohesive responsibilities (e.g., database access). This is the basic practice of modularization to support a separation of concerns.

This chapter briefly ...