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In this contribution we introduce GENGED, an environment which is used to interactively specify and generate syntax-directed editors for visual languages. In analogy to textual languages a visual language is specified by both, an alphabet and a grammar. Hence, the GENGED environment provides an Alphabet Editor and a Grammar Editor, respectively. The grammar rules defined using the Grammar Editor specify not only language-generating rules but additionally the editing commands of the Graphic Editor for the specific visual language. The language-specific Graphic Editor then can be used in various environments to allow for syntax-directed drawing of diagrams.

Tool-Based Specification of Visual Languages and Graphic Editors