Generating Diagram Editors with DiaGen

. DiaGen is a specification method, which is primarily based on a hypergraph grammar, and a tool that allows to automatically generate diagram editors from such a specification. Generated editors are free-hand editors, but with an automatic, constraint-based layout for correct diagrams. A hypergraph parser checks diagram correctness and makes it possible to translate diagrams into some user-defined semantic representation. This paper briefly outlines DiaGen and the process of creating diagram editors with DiaGen. 1 Introduction Today many systems communicate information through diagrams and therefore have to contain diagram editors, i.e., graphical editors that are tailored to the corresponding class of diagrams. Examples are current UML tools, which offer editors for class diagrams, sequence diagrams and others [8], or visual programming tools for programmable logic controllers, which allow to edit ladder diagrams and sequential function charts [3]. When implementing such a d..