Today, information system evolution primarily consists of extending the information systems and migrate them to modern platforms. This book tackles the problem of understanding and adapting information systems based on the systems data and their interdependencies. In this context several methods and tools have been proposed for a reengineering process. Since legacy systems have grown over years and lack sufficient documentation, reengineering is a complex and hard task. Tool supported reengineering approaches and processes reduce the complexity and risks during information system maintenance....