Pattern-oriented software architecture is a new approach to software development. This book represents the progression and evolution of the pattern approach into a system of patterns capable of describing and documenting large-scale applications. A pattern system provides, on one level, a pool of proven solutions to many recurring design problems. On another it shows how to combine individual patterns into heterogeneous structures and as such it can be used to facilitate a constructive development of software systems. Uniquely, the patterns that are presented in this book span several levels of abstraction, from high-level architectural frameworks and medium-level design patterns to low-level idioms. The intention of, and motivation for, this book is to support both novices and experts in software development. Novices will gain from the experience inherent in pattern descriptions and experts will hopefully make use of, add to, extend and modify patterns to tailor them to their own needs. None of the pattern descriptions are cast in stone and, just as they are borne from experience, it is expected that further use will feed in and refine individual patterns and produce an evolving systems of patterns.

An introduction to the concept of patterns and the principles of pattern description are followed by sections providing a catalog of patterns, an argument for the importance of organizing patterns into systems, discussion of how patterns are embedded into software architecture, a history of patterns and related work, and a view to the future.
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Both a tutorial and a reference guide, this manual presents a number of techniques for solving recurring software design problems in a comprehensive manner which includes many guidelines and constraints regarding practical applications.

Includes bibliographical references (p. 441-453) and index.