In this work, we improve our previous work on aspectocl, which is an extension of ocl that allows modeling of crosscutting constraints. Since then, ocl has become a key component of any modeldriven engineering mde technique as the default language for expressing all. In ocl, constraints are represented as expressions that restrict the various modeling elements. Softwareengineering ocl linaye softwareengineeringocl. For the love of physics walter lewin may 16, 2011 duration. When ocl constraints evolve regularly, it is essential that they are easy to understand and maintain. The object constraint language ocl started as a complement of the uml notation with the goal to overcome the limitations of uml and in general, any graphical notation in terms of precisely specifying detailed aspects of a system design. Pdf the object constraint language ocl started as a complement of the uml. Ethical, social, economic, safety and legal issues.
Bridge the gap between practically used software specifications uml and formal languages introduce into ocl history, outline, literature learn how to specify semantics using ocl learn what are interesting ocl use cases inform what ocl tools can already be used dr. Object constraint language formal language for expressing constraints over a set of objects and their attributes part of the uml standard used to write constraints that cannot otherwise be expressed in a diagram declarative no side effects no control flow. Functional testing using ocl predicates to improve software quality. Ocl is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms the free dictionary. Eclipse ocl may be installed indirectly by downloading an archive zip from project downloads and then using the downloaded zip as the works with site for helpinstall new software. Feb 23, 2015 for the love of physics walter lewin may 16, 2011 duration. Abstractas a standard modeling language of software architecture design, uml lacks formal semantics on account of its informal graphical notation. Department of computer science, institute for software and multimedia technology.
Evaluation of tools and slicing techniques for efficient. Software specification problem, unified modeling language uml, object constraint language ocl. Software architecture and design teaches the principles and concepts involved in the analysis and design of large software systems. Ocl makes a metaobject facility model more precise by associating assertions with its metaelements. Object constraint language ocl tutorial modeling languages.
The object constraint language ocl is a declarative language describing rules applying to. Precise modeling is essential to the success of the omgs model driven architecture initiative. It is most effective for computations which are based on large vectors or ndimensional arrays of numbers, and mostly but not limited to identical elementwise operations. In order to distinguish them, the parentheses after the name of an operation is required. Generally, ocl constraints are written manually, which may. Mar 21, 2012 initially, ocl was only used as a constraint language for uml but quickly expanded its scope and now ocl has become a key component of any modeldriven engineering mde technique as the default language for expressing all kinds of metamodel query, manipulation and specification requirements.
Metrics, project management, costing, marketing, control, standards, case tools and bugs. Of particular importance to model driven engineering mde or modeldriven architecture is the notion of model transformation. Software specification problem, unified modeling language uml, object constraint language ocl software specification problem in different phases of the software process we need ways to specify the deliverable for that phase. This paper makes an investigation into the recent developments and explores the role of ocl. Umlocl class diagrams provide highlevel descriptions of software systems. At the metalevel m2, queries, views and transformations are subjects that will be vital to the success of the omgs. Advances in applications of object constraint language for. The whole software design process has to be formally managed long before the first line of code is written. Object constraint language ocl allows software developers to make uml models more precise ocl expressions and constraints can be used to reduce the imprecision in uml designs one can augment a uml models with constraints written in ocl ocl constraints can be used to write contracts for uml classes. The article an ocl extension for realtime constraints describes and interesting extension to ocl for the specification of time constraints new types oclconfiguration and oclpath are defined along with a new post operation which is able to generate a set of possible oclpath for a specified time interval at pag. Introduction modeldriven engineering mde is a prominent area in the software engineering. Object constraint language ocl proceedings of the 12th. Aug 23, 2018 modeldriven engineering mde enables the rise in abstraction during development in software and system design. Software engineering practice in industry, related to the design and commissioning of large software systems.
Formal methods in software engineering 35 building models with ocl introduction completing uml diagrams modeling tips and hints summary formal methods in software engineering 36 summary a model allows one to focus on high level design decisions, rather. To further provide refined description of uml, ocl is primarily and widely employed. Since then, ocl has become a key component of any modeldriven engineering mde technique as the default. Eclipse ocl may be installed indirectly by downloading an archive zip from project downloads and then using the downloaded zip as the works with site for help install new software. Formal specificationbased testing is one of the major criterions to detect faults in the requirement specification or design of a system. Proceedings of the 12th international conference on formal methods for the design of computer, communication, and software systems. At the metalevel m2, queries, views and transformations are subjects that will be vital to the success of the. The ocl end user sdk feature provides the classic ocl support with distinct ecore and uml apis. Of course, in all case tools uml models can be annotated with textual ocl expressions but this does not mean that the tool actually understand the expression, usually the expression is treated as any other kind of annotation written by the designer. Currently, uml ocl class diagrams are highly used for code generation through several transformations in order to save time and effort of software developers. In this episode were talking to anneke kleppe about modeldriven software development and language engineering. Ocl is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms. Advanced topics in software engineering research, including techniques used in the modeling and analysis of complex systems course objectives.
Softwareengineering ocl linaye introduction constraints contextandself invariant preandpostcondition constraintsonattributes language accesstocharacteristics types variable collections oclfunction example operationoncollection someexamples. Questions tagged ocl ask question the object constraint language ocl is a declarative language describing rules applying to unified modeling language uml models developed at ibm and is now part of the uml standard. Please report any encountered bugs using the ticket system. Oct 08, 2008 lecture series on software engineering by prof. Formal methods in software engineering 21 attributes and operations attributes and query operations of a userdefined type can be used in ocl expressions. Looking for online definition of ocl or what ocl stands for. Softwareengineering ocl linaye introduction constraints contextandself invariant preandpostcondition constraintsonattributes language accesstocharacteristics types variable collections oclfunction. Can ocl be extended to become a full highlevel executable language with sideeffects. Ocl and model driven engineering jean bezivin 1, thomas baar 2, tracy gardner 3, martin gogolla 4, reiner hahnle 5, heinrich hussmann 6, octavian patrascoiu 7, peter h. Object constraint language formal language for expressing constraints over a set of objects and their attributes part of the uml standard used to write constraints that cannot otherwise be expressed in a diagram declarative no side effects. Functional testing using ocl predicates to improve. Ocl is a strongly typed and side effectfree specification language in which expressions are written in a declarative form.
At the modeling level m1 ocl allows for the precision needed to write executable models. Object constraint language ocl constraints are typically used to provide precise semantics to models developed with the unified modeling language uml. Software engineers produce lengthy design documents using computeraided software engineering tools. Automated refactoring of ocl constraints with search. Permission to reproduce or copy all or parts of this material for nonprofit use is granted on the condition that the author and source are credited. Articulating and enforcing authorisation policies with uml. It is also considered a part of overall systems engineering. Softwareengineering ocl linaye introduction constraints contextandself invariant preandpostcondition constraintsonattributes. The textbook and the accompanying materials posted on this website are freely available for fair use. Over the years, a new trend of approaches has emerged advocating languages, standards,toolsandwellde.
Software engineering stack exchange is a question and answer site for professionals, academics, and students working within the systems development life cycle. Teaching uml and ocl models and their validation to software. Therefore, verification of these class diagrams is essential in order to generate accurate transformations. Teaching uml and ocl models and their validation to software engineering students. Extended and updated coverage in many chapters that addresses the unified process and uml, the cmmi, software engineering patterns for process, analysis, design and testing, usecases, componentlevel design strategies, ocl, goaloriented software metrics, project management, sqa, and scm issues, and many other important topics. Ocl is also a navigation language for graphbased models. Software engineering is a direct subfield of engineering and has an overlap with computer science and management science. Citeseerx ocl constraints automatic generation for uml. Since its introduction as part of unified modeling language, ocl has received significant attention by researchers with works in the literature ranging from temporal extensions of ocl to automated test generation by solving ocl constraints. Currently, umlocl class diagrams are highly used for code generation through several transformations in order to save time and effort of software developers. Object constraint language ocl is a standard language defined by object management group for specifying constraints on models. The package is installable in gnu octave and offers opencl support for parallelization of numerical computations. Wolfgang reif, is a scientific institution within the faculty of applied computer science of the university of augsburg. In research, the institute supports both fundamental and applicationoriented research in all areas.
Lecture 1 introduction to software engineering youtube. Citeseerx document details isaac councill, lee giles, pradeep teregowda. In modeldriven software engineering, the presence of crosscutting constraints makes it difficult to maintain constraints defined on the models of largescale industrial systems. In order to define constraints, invariants, and queries on modeldriven artifacts, a generic. List of ocl tools the number of modeling tools supporting ocl is growing but still small. Initially, ocl was merely a formal specification language extension for uml. The software engineer then converts the design documents into design specification documents, which are used to design code. Automating java program testing using ocl and aspectj. Ocl may now be used with any metaobject facility mof object management group omg metamodel, including uml.
Upon completion of this course, the successful students will be able to use the unified modeling language uml and design patterns to model and analyze mediumsized software systems. Citeseerx articulating and enforcing authorisation policies. Software engineering is the systematic application of engineering approaches to the development of software. Each ocl expression indicates a value or object within the model that conforms to a type, e. Advanced uml modeling beyond csi5324, which includes modeling techniques using ocl, profiles, patternsaspects, etc. The object constraint language ocl is a declarative language describing rules applying to unified modeling language uml models developed at ibm and is now part of the uml standard. In order to define constraints, invariants, and queries on modeldriven artifacts, a generic language has been developed. Modeldriven engineering mde enables the rise in abstraction during development in software and system design. Uml ocl class diagrams provide highlevel descriptions of software systems. This paper makes an investigation into the recent developments and explores the role of ocl in the current scenario and its future applications.
Mde based software development processoriginal 1st nth model. Ocl can also be used by other languages, notations, methods and software tools in. We start with her involvement in the creation of the object constraint language ocl and discuss the intial expactations, actual experiences, and the place of ocl in the current day. Use is a system for the specification and validation of information systems based on a subset of the unified modeling language uml and the object constraint language ocl. Jul 24, 2019 the whole software design process has to be formally managed long before the first line of code is written. Newest ocl questions software engineering stack exchange. Teaching uml and ocl models and their validation to. Introduction to ocl tutorial given at the sfm12 summer school learn. Eclipse ocl has open bugs and a newsgroup or forum. For instance, in cancer registries, to ensure the quality of cancer data, more than one thousand.
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