Directly after the World Usability Day in Dresden I attended the Graph Transformation Day in Bremen. Here, I gave a talk about the generation of correctness-preserving editing operations for diagram editors. More on this later...
The other talks have been given by my supervisor Prof. Mark Minas (about using triple graph grammars for analysis in diagram editors), Dr. Rubino Geiß, the architect of the GrGen graph transformation engine (and indeed his talk was about the implementation and application of GrGen), and finally Edgar Jakumeit, who described the realization of recursive matching rules for GrGen. I have found these recursive "star" rules particularly interesting, because they actually allow to write parsers with GrGen in a declarative style. In a sense, this is quite similar to my approach to graph parsing via combinators.
It was a nice workshop. I learned a lot about the GrGen system. In particular I now have an idea how they managed to build the fastest (at least in quite some cases) graph transformation tool in the wild. Thank you Berthold for organizing this...
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