For example, in 2004 ACM / IEEE Software Engineering Curriculum Guidelines list software evolution as one of the ten key areas of software engineering education. Mens and Demeyer, both international authorities in the field of software evolution, together with the invited contributors, focus on new trends in software evolution research and relations with other emerging disciplines such as software engineering model-driven, service-oriented software development, and oriented aspects of software development. They did not limit itself to the evolution of source code, but also addresses the evolution of other, equally important software artifacts such as databases and database schema, design model, software architecture, and process management.