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P. Griebel. Paralleles Losen von grafischen Constraints. PhD thesis, University of Paderborn, Germany, February 1996.

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This paper is cited in the following contexts:
Generic Description, Behavior and Animation of Visual.. - Bardohl, Ehrig, Ermel (2000)   (Correct)

....there is already a general approach with tool support for the generic description of visual languages, called GenGEd [1] developed at the Technical University of Berlin. The GenGEd approach is based on algebraic graph transformation and graphical constraint solving techniques and tools [1, 14, 18, 6] and has been successfully applied to a variety of visual modeling languages, including at least simplified versions of UML class diagrams, statecharts, Nassi Shneiderman diagrams and Petri nets [3, 15, 5] The GenGEd approach is supported by the tool environment GenGEd [1, 2] This environment ....

P. Griebel. Paralleles Losen von grafischen Constraints. PhD thesis, University of Paderborn, Germany, February 1996.


Towards Visual Specification and Animation of Petri Net.. - Bardohl, Ermel, Ribeiro (2000)   (Correct)

.... how to use GenGEd [1, 4] for the specification and animation of Algebraic High Level nets (short AHL nets) 16] a combination of place transition nets [17] and algebraic specifications [7, 6] GenGEd is based on algebraic graph transformation and graphical constraint solving techniques and tools [18, 9] and has been successfully applied to a variety of visual languages, including at least simplified versions of UML class diagrams, statecharts, Nassi Shneiderman diagrams and Petri nets [1, 8] The GenGEd specification tool [3, 14] supports the visual definition of visual languages. The resulting ....

....GenGEd environment by the graph transformation system Agg [18] Graphical constraints constituting a constraint satisfaction problem Csp, define the layout of the symbols and their links in all three editors. In the GenGEd environment, the Csp is solved by the graphical constraint solver Parcon [9] after each VL rule application. In the GenGEd approach, two levels of syntax descriptions are considered, called abstract syntax and concrete syntax. The abstract syntax level describes the logical meaning whereas the concrete syntax level is used for the layout. This distinctions is drawn with ....

P. Griebel. Paralleles Losen von grafischen Constraints. PhD thesis, University of Paderborn, Germany, February 1996.

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