Rule-Based Programming with Diaplan

Diaplan is a language for programming with graphs and diagrams that is currently being designed and implemented by the authors. In this paper, a programming example, declaration grids, shall illustrate how Diaplan supports a functional and object-oriented style of programming. The example also indicates which features are needed beyond those discussed in previous work on the language [B. Hoffmann, ion and control for shapely nested graph transformation, Fundamenta Informaticae 58 (2003) 39-56].