We live in the information age: Huge amounts of information are available at our fingertips and computers influence every aspect in our lives. In particular we have to deal with an increasing amount of e-documents in research as well as in industries. Therefore the research on Document Engineering is concerned with principles, tools and processes that improve our ability to create, manage, and maintain documents. However only a few aspects of this broad research field found their way into practice, e.g. document management systems (DMS).