The development of user interfaces is influenced by various challenges in recent years. These are foremost caused by an increasing complexity of the underlying applications, the use of applications on different devices and by different types of users and by frequently changing application environments. Model-based user interface development approaches have been shown to be suitable to face these challenges. However, creating, transforming and linking the various included models are complex tasks. Employing patterns can reduce complexity by providing an advanced concept of reuse. In this book...