17/8/25. Patrn Enterprise Applictn Architctre. Provides information on developing enterprise applications, reference to the patterns, usage and implementation, and code examples in Java or C#. This book, illustrated with UML diagrams to further explain the concepts, covers the division of an enterprise application into layers, approaches to organizing business logic, and more.The practice of enterprise application development has benefited from the emergence of many new enabling technologies. Multi-tiered object-oriented platforms, such as Java and .NET, have become commonplace. These new tools and technologies are capable of building powerful applications, but they are not easily implemented. Common failures in enterprise applications often occur because their developers do not understand the architectural lessons that experienced object developers have learned.