The book begins with a history of UML, from structured design methods of the '60s and '70s to the competing object-oriented design standards that were unified in 1997 to create UML. For the novice, the authors illustrate key diagram types such as class, use case, state machine, activity, and implementation. (Of course, learning these basic diagram types is what UML is all about. The authors use an easy-to-understand ticket-booking system for many of their examples.)

UML has taken the software development industry by storm. Widely supported by development and documentation tools, UML can be used on the one hand by programmers to record such things as the detailed design of classes in an object-oriented system and on the other hand by business analysts to give the broad-brush picture of how a system interacts with users and other systems. UML has become the lingua franca of software development, and no one in the software industry can afford to be without knowledge of this powerfully expressive visual language.

Learning UML introduces UML and places it in perspective, then leads you through an orderly progress towards mastery of the language. You'll begin by learning how UML is used to model the structure of a system. Many key UML concepts, especially that of the general (classes) versus the specific (objects), are illustrated in the chapter on class and object diagrams. Next, you'll learn how to use use-case diagrams to model the functionality of a system. Finally, you'll see how component and deployment diagrams are used to model the way in which a system is deployed in a physical environment.

The second edition of Martin Fowler's bestselling UML Distilled provides updates to the Unified Modeling Language (UML) without changing its basic formula for success. It is still arguably the best resource for quick, no-nonsense explanations of using UML.

The major strength of UML Distilled is its short, concise presentation of the essentials of UML and where it fits within today's software development process. The book describes all the major UML diagram types, what they're for, and the basic notation involved in creating and deciphering them. These diagrams include use cases; class and interaction diagrams; collaborations; and state, activity, and physical diagrams. The examples are always clear, and the explanations cut to the fundamental design logic.

For the second edition, the material has been reworked for use cases and activity diagrams, plus there are numerous small tweaks throughout, including the latest UML v. 1.3 standard. An appendix even traces the evolution of UML versions.

Working developers often don't have time to keep up with new innovations in software engineering. This new edition lets you get acquainted with some of the best thinking about efficient object-oriented software design using UML in a convenient format that will be essential to anyone who designs software professionally. --Richard Dragan