Volume 1, Issue 1, January 2011 - DROPS - Schloss Dagstuhl

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60 11031 – Bidirectional Transformations “bx” 4.15 Symmetric lenses Martin Hofmann (LMU München, DE) License Creative Commons BY-NC-ND 3.0 Unported license © Martin Hofmann Main reference Martin Hofmann, Benjamin C. Pierce, Daniel Wagner: Symmetric lenses. Proc. ACM Symp. POPL 2011: 371-384, ACM Press, 2011. Symmetric lenses have been proposed by Pierce, Wagner, and myself as a completely symmetric generalisation of lenses which in turn are a category-theoretic abstraction of a pair of a view extraction and update functions. This position statement gives a taste of definition, basic category-theoretic properties, datatypes and iterators, as well as a representation theorem. Details in our paper at POPL2011. 4.16 Triple Graph Grammars: Concepts, Extensions, Implementations, and Application Scenarios Ekkart Kindler (Technical University of Denmark, DK) License Creative Commons BY-NC-ND 3.0 Unported license © Ekkart Kindler Main reference Technical Report tr-ri-07-284, Software Engineering Group, Department of Computer Science, University of Paderborn, June 2007. URL http://www2.cs.uni-paderborn.de/cs/ag-schaefer/Veroeffentlichungen/Quellen/Papers/2007/tr-ri- 07-284.pdf Triple Graph Grammars (TGGs) are a technique for defining the correspondence between two different types of models in a declarative way. The power of TGGs comes from the fact that the relation between the two models can not only be defined, but the definition can be made operational so that one model can be transformed into the other in either direction; even more, TGGs can be used to synchronize and to maintain the correspondence of the two models, even if both of them are changed independently of each other; i. e., TGGs work incrementally. TGGs have been introduced more than 10 years ago by Andy Schürr. Since that time, there have been many different applications of TGGs for transforming models and for maintaining the correspondence between these models. To date, there have been several modifications, generalizations, extensions, and variations. Moreover, there are different approaches for implementing the actual transformations and synchronizations of models. In this paper, we present the essential concepts of TGGs, their spirit, their purpose, and their fields of application. We also discuss some of the extensions along with some of the inherent design decisions, as well as their benefits and caveats. All these are based on several year’s of experience of using TGGs in different projects in different application areas.
Zhenjiang Hu, Andy Schürr, Perdita Stevens, and James Terwilliger 61 4.17 Some challenges of integrating bidirectional transformation technologies Ekkart Kindler (Technical University of Denmark, DK) License Creative Commons BY-NC-ND 3.0 Unported license © Ekkart Kindler There are different kinds of uni- and bi-directional transformation mechanisms, which are based on different philosophies, paradigms, and principles. In concrete situations, one often would like to combine different technologies in order to achieve certain goals; but this is not possible for fundamental principal differences, some conceptual differences, or simply for technical reasons. This position statement heads at identifying some issues and triggering the work on a clear conceptual framework and interfaces that would allow comparing and integrating different transformation technologies. 4.18 Towards Systematic Development of Bidirectional Transformations Jochen M. Kuester (IBM Research Zürich - Rüschlikon, CH) License Creative Commons BY-NC-ND 3.0 Unported license © Jochen M. Kuester In order to adopt bidirectional model transformations in industry, an approach for their systematic development is required. Such an approach includes methods and tools for requirements specification, design and implementation of bidirectional model transformations. In this presentation, we first report on lessons learnt from the development of a solution based on unidirectional model transformations and then establish several requirements for systematic development of bidirectional model transformations. 4.19 Right Inverses in Bidirectionalization Kazutaka Matsuda (Tohoku University, JP) License Creative Commons BY-NC-ND 3.0 Unported license © Kazutaka Matsuda Bidirectionalization is a program transformation that derives a bidirectional transformation from a unidirectional transformation automatically or manually. We emphasize on the importance of right-inverse construction in syntactic bidirectionalization. Right inverses are useful not only for construction of so-called "create" functions but also for construction of bidirectional transformations whose behavior can be controlled by users. 1 1 0 3 1
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Volume 1, Issue 1, January 2011 - DROPS - Schloss Dagstuhl

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