By Benjamin C. Pierce (auth.), Richard F. Paige (eds.)
This booklet constitutes the refereed court cases of the second one overseas convention on concept and perform of version modifications, ICMT 2009, held on the ETH in Zurich, Switzerland, in June 2009.
The 14 revised complete papers and three revised brief papers provided including 1 invited lecture have been conscientiously reviewed and chosen from sixty seven submissions. The papers deal with questions on the character and lines of version differences, their composability and mixture to construct new version differences and enforce high-level version administration operations, the class of languages for expressing differences, the dimension of the standard and extra-functional requisites of version variations, and the definition of improvement methodologies that let exploiting all their power advantages. the quantity additionally includes the mins of the GRACE overseas assembly on Bidirectional alterations, held in December 2009 close to Tokyo, Japan.
Read or Download Theory and Practice of Model Transformations: Second International Conference, ICMT 2009, Zurich, Switzerland, June 29-30, 2009. Proceedings PDF
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Additional info for Theory and Practice of Model Transformations: Second International Conference, ICMT 2009, Zurich, Switzerland, June 29-30, 2009. Proceedings
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1 as a JVM (hence the larger memory consumption figures). Execution times can be observed in Table 4. Unsurprisingly, the execution time of the hybrid adaptive approach is between the fastest INC, the static hybrid approaches and a pure LS run. Note that memory was constrained for hybrid runs, marked with *; with memory constraints, INC would not run successfully in this case. 32 G. Bergmann et al. Table 4. Match Set Memory and Performance of the Adaptive Hybrid Strategy PM strategy Used heap [MB] Transform phase time [ms] LS 201 77054 INC 353 13693 Static hybrid 220* 10958 Adaptive hybrid 235* 35716 Overall, this technique prevents the transformation engine from trashing due to memory starvation.
Such a dependence is due to the reference owner which, according to the KM3 metamodel, needs to be specified for each structural feature. Being more precise, our solution is based on the following observation: given two versions of a same metamodel and a model Δ which represents their differences, the models ΔR and Δ¬R obtained from the decomposition of Δ to isolate breaking resolvable and unresolvable modifications, respectively, are parallel dependent when the source and the target elements of the following references (defined in the KM3 difference metamodel) are not in the same difference model: – owner : StructuralF eature → {AddedClass, ChangedClass}, all the attributes and references defined in a given metamodel are related to a corresponding class which represents their owner.
While the direct contributions of the paper are dedicated to graph transformationbased approaches of model transformations, we believe that the conceptual foundations are, in fact, adaptable to other transformation techniques. For instance, similar investigations can be carried out in the future to assess when an OCL constraint should be evaluated incrementally, and when an evaluation should be initiated from scratch. References 1. , Rozenberg, G. ): Handbook on Graph Grammars and Computing by Graph Transformation.