This guide explains how to add object constraint language (OCL) expressions to UML models, generate Java code from a combined UML/OCL model, and use OCL to define transformations for the model driven architecture (MDA). The second half of the book is a reference manual that reviews the context of OCL expressions, the basic elements for writing constraints, user-defined types, and collection types. The second edition covers OCL 2.0. Annotation (c) Book News, Inc., Portland, OR (booknews.com)