A Graphical Approach to Prove the Semantic Preservation of UML/OCL Refactoring Rules

Baar, Thomas; Marković, Slaviša

doi:10.1007/978-3-540-70881-0_9

Cited by 16 publications

(13 citation statements)

References 6 publications

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“…To argue on semantical correctness of refactoring rules, it has been very handy to have the OCL semantics specified in the same formalism as refactoring rules, in QVT. A more detailed description together with a complete argumentation on the semantical correctness of the MoveAttribute refactoring rule can be found in [44].…”

Section: Discussionmentioning

confidence: 99%

Semantics of OCL specified with QVT

Marković

Baar

2008

Softw Syst Model

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The Object Constraint Language (OCL) has been for many years formalized both in its syntax and semantics in the language standard. While the official definition of OCL's syntax is already widely accepted and strictly supported by most OCL tools, there is no such agreement on OCL's semantics, yet. In this paper, we propose an approach based on metamodeling and model transformations for formalizing the semantics of OCL. Similarly to OCL's official semantics, our semantics formalizes the semantic domain of OCL, i.e. the possible values to which OCL expressions can evaluate, by a metamodel. Contrary to OCL's official semantics, the evaluation of OCL expressions is formalized in our approach by model transformations written in QVT. Thanks to the chosen format, our semantics definition for OCL can be automatically transformed into a tool, which evaluates OCL expressions in a given context. Our work on the formalization of OCL's semantics resulted also in the identification and better understanding of important semantic concepts, on which OCL relies. These insights are of great help when OCL has to be tailored as a constraint language of a given DSL. We show on an example, how the semantics of OCL has to be redefined in order to become a constraint language in a database domain.

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Section: Discussionmentioning

confidence: 99%

Semantics of OCL specified with QVT

Marković

Baar

2008

Softw Syst Model

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Section: Discussionmentioning

confidence: 99%

An OCL Semantics Specified with QVT

Marković

Baar

2006

Model Driven Engineering Languages and Systems

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Abstract. Metamodeling became in the last decade a widely accepted tool to describe the (abstract) syntax of modeling languages in a concise, but yet precise way. For the description of the language's semantics, the situation is less satisfactory and formal semantics definitions are still seen as a challenge. In this paper, we propose an approach to specify the semantics of modeling languages in a graphical way. As an example, we describe the evaluation semantics of OCL by transformation rules written in the graphical formalism QVT. We believe that the graphical format of our OCL semantics has natural advantages with respect to understandability compared to existing formalizations of OCL's semantics. Our semantics can also be seen as a reference implementation of an OCL evaluator, because the transformation rules can be executed by any QVT compliant transformation engine.

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“…For instance, Baar and Marković [7] proved that Uml class diagrams containing Ocl constraints are correctly refactored: the refactored diagrams are still valid diagrams, and the Ocl constraints are modified according to the refactorings such that they are still valid sentences. Similarly, Schätz [102] proved the conformance of output ECore models using a relational formal specification of metamodels and models; the proof is discharged in most cases automatically by the Isabelle/Hol theorem-prover.…”

Section: Conformance and Model Typingmentioning

confidence: 99%

“…In this case, although the behavioral properties mentioned above do not apply, relations between the structural semantics of input and output models may still be established. Massoni et al [75] and Baar and Marković [7,74] present a set of refactoring transformations that preserve the instantiation semantics of UML class diagrams. Table 1 classifies the literature contributions we reviewed according to the property classes they are targeting, based on the dual nature of model transformations.…”

Section: Consistency Of Bidirectional Transformationsmentioning

confidence: 99%

“…Isabelle/Hol was also used by Schätz [102] to prove the conformance of output models. Marković and Baar [7,74] proved that a Java implementation of some of their refactoring rules for Uml class diagrams containing Ocl constraints preserve the instantiation semantic of class diagrams (although the reimplementation in Java of the refactoring rules can be seen as a non-direct proof of the rules' Ocl implementation). Lano and Kolahdouz-Rahimi [67] used the B Method to prove several properties over Uml-Rsds (syntactic correctness, uniqueness, and transformation confluence), from which trustable Java code is generated automatically.…”

Section: Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Formal Verification Techniques for Model Transformations: A Tridimensional Classification .

Amrani¹,

Combemale²,

Levi³

et al. 2015

JOT

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In Model Driven Engineering (Mde), models are first-class citizens, and model transformation is Mde's "heart and soul". Since model transformations are executed for a family of (conforming) models, their validity becomes a crucial issue.This paper proposes to explore the question of the formal verification of model transformation properties through a tridimensional approach: the transformation involved, the properties of interest addressed, and the formal verification techniques used to establish the properties.This work is intended for a double audience. For newcomers, it provides a tutorial introduction to the field of formal verification of model transformations. For readers more familiar with formal methods and model transformations, it proposes a literature review (although not systematic) of the contributions of the field.Overall, this work allows to better understand the evolution, trends and current practice in the domain of model transformation verification. This work opens an interesting research line for building an engineering of model transformation verification guided by the notion of model transformation intent.

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A Graphical Approach to Prove the Semantic Preservation of UML/OCL Refactoring Rules

Cited by 16 publications

References 6 publications

Semantics of OCL specified with QVT

Semantics of OCL specified with QVT

An OCL Semantics Specified with QVT

Formal Verification Techniques for Model Transformations: A Tridimensional Classification .

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