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共 97 条记录，以下是71-80 订阅

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Ladder metamodeling and PLC program validation through time Petri nets

Ladder metamodeling and PLC program validation through time ...

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4th european conference on model driven architecture - foundations and applications

作者： Bender, Darlam Fabio Combemale, Benoit Cregut, Xavier Farines, Jean Marie Berthomieu, Bernard Vernadat, Francois Univ Toulouse Inst Rech Informat Toulouse CNRS UMR 5505 Toulouse France Univ Fed Santa Catarina Dept Automacao Sistemas Florianopolis SC Brazil Univ Toulouse CNRS Labe Analyse Archicteture Sys F-31042 Toulouse France

ISBN: (纸本)9783540690955

Ladder Diagram (LD) is the most used programming language for Programmable Logical Controllers (PLCs). A PLC is a special purpose industrial computer used to automate industrial processes. Bugs in LD programs, are very costly and sometimes are even a threat to human safety. We: propose a model driven approach for formal verification of LD programs through model-checking. We provide a metamodel for a subset of the LD language. We define a time Petri net (TPN) semantics for LD programs through an ATL model transformation. Finally, we automatically generate behavioral properties over the LD models as LTL formulae which are then checked over the generated TPN using the model-checkers available in the Tina toolkit. We focus on race condition detection.

关键词： model checking

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model-driven platform-specific testing through configurable simulations

Model-driven platform-specific testing through configurable ...

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4th european conference on model driven architecture - foundations and applications

作者： Kuhn, T. Gotzhein, R. Univ Kaiserslautern Networked Syst Grp D-67663 Kaiserslautern Germany

ISBN: (纸本)9783540690955

the increasing size and complexity of software systems requires sophisticated testing methodologies. Since platform limitations could void the results of test suites, especially the embedded systems domain requires testing methodologies that also consider hardware resources. Current approaches for specifying and executing test cases, e.g. approaches based on the UML testing model, do not support the concept of platform testing very well. Deployment descriptions are only used for documentation. In this work, we address this problem by providing an extension to the UML testing profile that covers the modeling of platform testing models, which include realistic deployments, and by C-PartsSim, our simulation tool that is capable of executing these platform testing models. With C-PartsSim, it is possible to connect specialized simulators at runtime, thereby providing a configurable, platform-specific system simulation for testing. We describe the automatic transformation from scenario models to a tailored simulator instance for a concrete testing scenario and present case studies to demonstrate the flexibility and accuracy of our approach.

关键词： Embedded systems

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A metamodeling approach for reasoning about requirements

A metamodeling approach for reasoning about requirements

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4th european conference on model driven architecture - foundations and applications

作者： Goknil, Arda Kurtev, Ivan van den Berg, Klaas Univ Twente Software Engn Grp NL-7500 AE Enschede Netherlands

ISBN: (纸本)9783540690955

In requirements engineering, there are several approaches for requirements modeling such as goal-oriented, aspect-driven, and system requirements modeling. In practice, companies often customize a given approach to their specific needs. thus, we seek a solution that allows customization in a systematic way. In this paper, we propose a metamodel for requirements models (called core metamodel) and an approach for customizing this metamodel in order to support various requirements modeling approaches. the core metamodel represents the common concepts extracted from some prevalent approaches. We define the semantics of the concepts and the relations in the core metamodel. Based on this formalization, we can perform reasoning on requirements that may detect implicit relations and inconsistencies. Our approach for customization keeps the semantics of the core concepts intact and thus allows reuse of tools and reasoning over the customized metamodel. We illustrate the customization of our core metamodel with SysML concepts. As a case study, we apply the reasoning on requirements of an industrial mobile service application based on this customized core requirements metamodel.

关键词： requirements metamodels reasoning model customization

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model-based generation of interlocking controller software from control tables

Model-based generation of interlocking controller software f...

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4th european conference on model driven architecture - foundations and applications

作者： Chevillat, C. Carrington, D. Strooper, P. Suess, J. G. Wildman, L. Sofismo AG Sgestr 50 CH-5600 Lenzburg Switzerland Univ Queensland Inf Technol & Electr Engn Brisbane Qld 4072 Australia

ISBN: (纸本)9783540690955

Railroad interlocking software drives specialised micro-devices, known as interlocking controllers. these controllers primarily actuate railroad points and change signal aspects in real-time, based on sensor and timer input. Due to their central function in railroad control, interlocking controllers and their firmware are safety-critical. the firmware programs, which mimic physical relays, are written in variants of domain-specific programming languages based on ladder logic. the programs have to comply with a more abstract specification of allowable states of sections of railroad track and equipment, known as a control table. the translation of a track layout and associated control tables into ladder logic-based code is manual, and hence subject to costly review and rework cycles. In this report, we describe a case study that uses a model-driven tool-chain as an automated alternative to the existing process. the two domain languages, control table and ladder logic, were modelled and transformations were implemented between the two models, and from model to program text. We report on implementation challenges, and describe the outlook and scalability of the approach in this application domain.

关键词： Railroads

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From UML ativities to TAAL - Towards behaviour-preserving model transformations

From UML ativities to TAAL - Towards behaviour-preserving mo...

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4th european conference on model driven architecture - foundations and applications, ECMDA-FA 2008

作者： Engels, Gregor Kleppe, Anneke Rensink, Arend Semenyak, Maria Soltenborn, Christian Wehrheim, Heike Department of Computer Science University of Paderborn 33098 Paderborn Germany Department of Computer Science University of Twente 7500 AE Enschede Netherlands

ISBN: (纸本)3540690956

model transformations support a model-driven design by providing an automatic translation of abstract models into more concrete ones, and eventually program code. Crucial to a successful application of model transformations is their correctness, in the sense that the meaning (semantics) of the models is preserved. this is especially important if the models not only describe the structure but also the intended behaviour of the systems. Reasoning about and showing correctness is, however, often impossible as the source and target models typically lack a precise definition of their semantics. In this paper, we take a first step towards provably correct behavioural model transformations. In particular, we develop transformations from UML Activities (which are visual models) to programs in TAAL, which is a textual Java-like programming language. Both languages come equipped with formal behavioural semantics, which, moreover, have the same semantic domain. this sets the stage for showing correctness, which in this case comes down to showing that the behaviour of every (well-formed) UML Activity coincides with that of the corresponding TAAL program, in a well-defined sense. © 2008 Springer-Verlag Berlin Heidelberg.

关键词： Semantics

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the AUTOSAR Way of model-Based Engineering of Automotive Systems

The AUTOSAR Way of Model-Based Engineering of Automotive Sys...

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4th International conference on Graph Transformation

作者： Doerr, Heiko Carmeq D-10587 Berlin Germany

ISBN: (纸本)9783540874041

the international development partnership AUTOSAR strives for reuse and exchange of SW components along various dimensions: between OEM and supplier, between vehicle platforms, between electronic networks, and between individual electronic control units (ECUs). To enable the exchange an abstraction layer - the AUTOSAR runtime environment (RTE) - has been defined as a set of services provided to applications. Typical services are communication via buses, memory access, or diagnostic support. the services are implemented by several stacks of basic SW-modules being highly configurable to support the large variety of ECUs. By configuration, the same SW module can be used for those ECUs with a given micro-controller abstraction. To exploit the variability in a structured approach, AUTOSAR defined a methodology which heavily makes use of so-called templates capturing all information of an electronic vehicle network. the data-structures are defined by a meta-model allowing for a consistent definition of the templates. the development approach adopted by AUTOSAR is related to model-driven development. At the first step in the methodology, an overall system description is defined showing the logical architecture of the SW system. Each SW component is described by an instance of the SW-template. When the SW system shall be applied to an electronic network, the dedicated HW resources must be described as well. So, the properties and capabilities of ECUs and buses are captured by an ECU resource template. During the next step, a mapping of the logical to the physical architecture has to be found. this task is of high importance, since it determines the overall system performance. Once the mapping is established, configuration files for individual ECUs of the network are generated. Based on the configuration the appropriate SW-components can be loaded onto the ECU and the required communication channels are established such that the SW application can be successfully executed. C

关键词： Mapping

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15 Years of Triple Graph Grammars Research Challenges, New Contributions, Open Problems

15 Years of Triple Graph Grammars Research Challenges, New C...

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4th International conference on Graph Transformation

作者： Schuerr, Andy Klar, Felix Tech Univ Darmstadt Real Time Syst Lab D-64283 Darmstadt Germany

ISBN: (纸本)9783540874041

Triple graph grammars (TGGs) have been invented 15 years ago as a formalism for the declarative specification of bidirectional graph-to-graph translations. In this paper we present a list of still open problems concerning the interpretation and the expressiveness of TGGs. We will comment on extensions proposed to improve the original approach and the drawbacks that arise thereof. Consequently a more precise formalization of compulsory properties of the translation of triple graph grammars into forward and backward graph translation functions is given. Regarding these properties an interpretation and implementation of negative application conditions is derived that does not destroy the benefits of the original approach. Additionally a new demand-driven forward/backward translation rule application strategy is proposed. It guarantees for the first time automatically a correct ordering of rule applications without imposing any additional requirements on the structure of the regarded graphs.

关键词： triple graph grammars graph translation model transformation rule application

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An open source domain-specific tools framework to support model driven development of OSS

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3rd european conference on model driven architecture - foundations and applications

作者： Achilleos, Achilleas Georgalas, Nektarios Yang, Kun Univ Essex Dept Elect Syst Engn Colchester CO4 3SQ Essex England British Telecom Grp London England

ISBN: (纸本)9783540729006

Telecommunications companies undergo massive transformations which reflect onto exacting requirements for controlling the costs of new Operation Support Systems (OSS) development and integration. this calls for the adoption of new approaches, which improve agility and reusability. model Drive Development (MDD), as specified by OMG, can drastically tackle these issues and has, therefore, attracted the interest of the telecommunications industry. Equally important is the Open Source paradigm. For MDD to gain wide industrial adoption, tools should be available to facilitate the OSS development process. In this paper, we specify requirements MDD tools should meet for effective application of the approach. An extensive survey is then carried out to evaluate existing meta-modelling frameworks over the identified tools requirements. Eventually, we present the Integrated Eclipse model driven Environment (IEME), which comprises a unified environment of bundled Eclipse-based MDD facilities that also supports the automatic generation of domain-specific tools.

关键词： meta-modelling MDA model-driven development domain specific languages modelling editor tools

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Improving the interoperability of automotive tools by raising the abstraction from legacy XML formats to standardized metamodels

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3rd european conference on model driven architecture - foundations and applications

作者： Brorkens, Mark Koster, Matthias Carmeq GmbH Carnotstr 4 D-10587 Berlin Germany

ISBN: (纸本)9783540729006

Automotive system design demands frequent exchange of data between different parties and tools. In order to improve the interoperability, standardization bodies and partnerships have put high effort in defining XML based languages for system descriptions. However, the mere existence of a standardized XML based data exchange format doesn't guarantee seamless interoperability. the validation possibilities given by XML DTD or Schema are not sufficient. Additionally, the maintenance of XML formats for the growing complexity of today's systems is an increasing challenge. this paper describes the experiences with the model-driven approach taken by the automotive initiative AUTOSAR. It illustrates the limitations of designing data exchange formats in XML and shows how a higher level of abstraction increases the interoperability between tools. A powerful concept for mapping a metamodel to XML schema allows for integrating legacy XML formats. Furthermore, current activities on improving interoperability by automatically generating a tool framework for AUTOSAR and other automotive tools are explained.

关键词： XML

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model transformation from OWL-S to BPEL via SiTra

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3rd european conference on model driven architecture - foundations and applications

作者： Bordbar, Behzad Howells, Gareth Evans, Michael Staikopoulos, Athanasios Univ Birmingham Birmingham B15 2TT W Midlands England Univ Kent Canterbury Kent England

ISBN: (纸本)9783540729006

Although there are a large number of academic and industrial model transformation frameworks available, allowing specification, implementation, maintenance and documentation of model transformations which provide a rich set of functionalities, such tools are inherently complex. In particular, for a newcomer to the field of model transformation and for researchers who are only interested in experimentation and creation of prototypes, the steep learning curve is a significant hurdle. there is thus a clear scope for the creation of model transformation frameworks that are both easy to use and able to conduct complex transformations. Simple Transformer (SiTra) is a model transformation framework, which was originally designed to be a "way in" for the experienced programmer, to start using the concepts of model transformation, and for academic researchers to experiment with the creation of prototypes of implementation of their transformations. the underlying idea of SiTra is to put less focus on the specification language, maintenance and documentation aspects of transformation, by focusing on the implementation of transformations. SiTra makes use of Java for the specification of transformations. this alleviates the need to learn a new specification language or get to grips with a new tool and development environment. SiTra is equipped with a strong transformation engine to execute the transformation behind the scenes. this paper reports on a case study involving transformations from Ontology Web Language-Service (OWL-S) to Business Process Execution Language (BPEL), demonstrating that SiTra can also be used to handle complex and large transformations.

关键词： model checking

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