: The World Wide Web’s anticipated scope as an environment for knowledge exchange has changed dramatically. Without major modifications to its primary mechanisms the Web has turned into a platform for distributed applications. The originally simple and well-defined coarse-grained implementation model of the Web now hinders Web application development. Fine-grained development artifacts, design patterns, and other well-established Software Engineering methods are hard to reuse in the Web after they have found their way into implementation resources. The application of Software Engineering practice to development for the Web, which is also referred to as Web Engineering, and especially the systematic reuse of components for Web-application development at low-costs is a main goal to achieve. This paper explains how the object-oriented and component-based WebComposition Markup Language (WCML) addresses these problems. A systematic approach to code reuse is presented with the WebCompositi...