By Perdita Stevens (auth.), Gregor Engels, Bill Opdyke, Douglas C. Schmidt, Frank Weil (eds.)
Read or Download Model Driven Engineering Languages and Systems: 10th International Conference, MoDELS 2007, Nashville, USA, September 30 - October 5, 2007. Proceedings PDF
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Extra info for Model Driven Engineering Languages and Systems: 10th International Conference, MoDELS 2007, Nashville, USA, September 30 - October 5, 2007. Proceedings
1). 4 Unified Transformation Representation In this section we describe a common, model-based, representation for transformations (Unified Transformation Representation – UTR) to establish a common ground among different transformation technologies. 1). 3. 1 UTR Metamodel Figure 2 shows an extract of the UTR metamodel. We clarify this metamodel in the following paragraphs. Basic Transformation Concepts. We make a distinction between the specification of a transformation, which encapsulates a concrete implementation, and the execution or instance of a transformation, which is subject to composition.
Secondly, once we have transformed one model into another, the engine can keep track of changes in either model and propagate those changes to the other model and change it accordingly. This is called model synchronization and is one of the most crucial application scenarios in round-trip engineering. Since QVT and TGGs have only a single definition of the relation between two classes of models, inconsistencies among the different transformation scenarios are avoided. QVT is the transformation technology recently proposed by the OMG for the MDA.
Then, TGG rules allow us to specify how these single graph grammar rules structurally correspond to each other. This correspondence is expressed by inserting a third graph grammar, where the nodes provide a mapping by referencing the nodes in the other two graph grammars. This is illustrated in Figure 5 for the example rule from Figure 2. The generation of graphs through the simultaneous application of these corresponding graph grammars always results in structurally corresponding graphs. 22 J.