scholarly journals An Operational Semantics for UML 2 Sequence Diagrams Supported by Model Transformations

2015 ◽  
Vol 56 ◽  
pp. 604-611 ◽  
Author(s):  
Nabil Messaoudi ◽  
Allaoua Chaoui ◽  
Mohamed Bettaz
Keyword(s):  
Operational Semantics ◽  
Model Transformations ◽  
Sequence Diagrams

An Approach to UML Consistency Checking Based on Compositional Semantics

2017 ◽  
Vol 8 (2) ◽  
pp. 1-23
Author(s):  
Messaoudi Nabil ◽  
Allaoua Chaoui ◽  
Mohamed Bettaz
Keyword(s):  
Formal Semantics ◽  
Spin Model ◽  
Model Transformations ◽  
State Machines ◽  
Consistency Checking ◽  
Sequence Diagrams ◽  
Compositional Semantics ◽  
Uml Modeling ◽  
Verification Methods ◽  
Spin Model Checker

One of the ways to specify dynamic behavior in UML is to model interactions between objects with sequence diagrams, and model the behavior of each object with state machines. In this context, the problem of ensuring consistency between the sequence diagrams and state machines may arise. To verify consistency, the authors propose an approach based on compositions of Büchi automata which allow us to capture the evolution of each object among the lifeline. This paper focuses on UML modeling and verification methods and bridges the gap between theoretical studies on formal semantics and practical studies to implement languages through model transformations. The transformations include basic interactions, state invariants, strict and weak sequencing, and alternative interaction fragments. Ultimately, the results of the transformations are integrated into the Spin model checker as a never claim property. The authors use the Automatic Gate Controller Railway (AGCR) as an example to illustrate their approach.

scholarly journals Specifying and Executing User Agents in an Environment of Reasoning and RESTful Systems Using the Guard-Stage-Milestone Approach

2021 ◽  
Author(s):  
Tobias Käfer ◽  
Benjamin Jochum ◽  
Nico Aßfalg ◽  
Leonard Nürnberg
Keyword(s):  
Linked Data ◽  
Operational Semantics ◽  
Workflow Management ◽  
Management Systems ◽  
Workflow Management Systems ◽  
The Web

AbstractFor Read-Write Linked Data, an environment of reasoning and RESTful interaction, we investigate the use of the Guard-Stage-Milestone approach for specifying and executing user agents. We present an ontology to specify user agents. Moreover, we give operational semantics to the ontology in a rule language that allows for executing user agents on Read-Write Linked Data. We evaluate our approach formally and regarding performance. Our work shows that despite different assumptions of this environment in contrast to the traditional environment of workflow management systems, the Guard-Stage-Milestone approach can be transferred and successfully applied on the web of Read-Write Linked Data.

scholarly journals Persistent Stochastic Non-Interference

2021 ◽  
Vol 181 (1) ◽  
pp. 1-35
Author(s):  
Jane Hillston ◽  
Andrea Marin ◽  
Carla Piazza ◽  
Sabina Rossi
Keyword(s):  
Process Algebra ◽  
Operational Semantics ◽  
Evaluation Process ◽  
Decision Algorithm ◽  
Secure Systems ◽  
Information Flow Security ◽  
Structural Operational Semantics ◽  
Timing Properties ◽  
Functional Point ◽  
Security Property

In this paper, we study an information flow security property for systems specified as terms of a quantitative Markovian process algebra, namely the Performance Evaluation Process Algebra (PEPA). We propose a quantitative extension of the Non-Interference property used to secure systems from the functional point view by assuming that the observers are able to measure also the timing properties of the system, e.g., the response time of certain actions or its throughput. We introduce the notion of Persistent Stochastic Non-Interference (PSNI) based on the idea that every state reachable by a process satisfies a basic Stochastic Non-Interference (SNI) property. The structural operational semantics of PEPA allows us to give two characterizations of PSNI: one based on a bisimulation-like equivalence relation inducing a lumping on the underlying Markov chain, and another one based on unwinding conditions which demand properties of individual actions. These two different characterizations naturally lead to efficient methods for the verification and construction of secure systems. A decision algorithm for PSNI is presented and an application of PSNI to a queueing system is discussed.

scholarly journals Evaluating the alignment of sequence diagrams with system behavior

2021 ◽  
Vol 180 ◽  
pp. 502-506
Author(s):  
Atif Mashkoor ◽  
Alexander Egyed
Keyword(s):  
Sequence Diagrams ◽  
System Behavior

scholarly journals Dynamic game semantics

2020 ◽  
pp. 1-60
Author(s):  
Norihiro Yamada ◽  
Samson Abramsky
Keyword(s):  
Programming Languages ◽  
Functional Programming ◽  
Operational Semantics ◽  
Dynamic Game ◽  
Standard Interpretation ◽  
Functional Programming Languages ◽  
Game Semantics ◽  
Wide Range ◽  
Cartesian Closed Categories ◽  
Cartesian Closed

Abstract The present work achieves a mathematical, in particular syntax-independent, formulation of dynamics and intensionality of computation in terms of games and strategies. Specifically, we give game semantics of a higher-order programming language that distinguishes programmes with the same value yet different algorithms (or intensionality) and the hiding operation on strategies that precisely corresponds to the (small-step) operational semantics (or dynamics) of the language. Categorically, our games and strategies give rise to a cartesian closed bicategory, and our game semantics forms an instance of a bicategorical generalisation of the standard interpretation of functional programming languages in cartesian closed categories. This work is intended to be a step towards a mathematical foundation of intensional and dynamic aspects of logic and computation; it should be applicable to a wide range of logics and computations.

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