Please report any encountered bugs using the ticket system. Jul 24, 2019 the whole software design process has to be formally managed long before the first line of code is written. Since then, ocl has become a key component of any modeldriven engineering mde technique as the default. Software engineering is a direct subfield of engineering and has an overlap with computer science and management science. Mde based software development processoriginal 1st nth model. 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. Evaluation of tools and slicing techniques for efficient. Softwareengineering ocl linaye introduction constraints contextandself invariant preandpostcondition constraintsonattributes language accesstocharacteristics types variable collections oclfunction example operationoncollection someexamples. Articulating and enforcing authorisation policies with uml.
Software engineers produce lengthy design documents using computeraided software engineering tools. The software engineer then converts the design documents into design specification documents, which are used to design code. 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. Formal methods in software engineering 21 attributes and operations attributes and query operations of a userdefined type can be used in ocl expressions. 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. Currently, umlocl class diagrams are highly used for code generation through several transformations in order to save time and effort of software developers.
Therefore, verification of these class diagrams is essential in order to generate accurate transformations. Ocl may now be used with any metaobject facility mof object management group omg metamodel, including uml. In ocl, constraints are represented as expressions that restrict the various modeling elements. Softwareengineering ocl linaye introduction constraints contextandself invariant preandpostcondition constraintsonattributes language accesstocharacteristics types variable collections oclfunction. Software engineering stack exchange is a question and answer site for professionals, academics, and students working within the systems development life cycle. Newest ocl questions software engineering stack exchange. List of ocl tools the number of modeling tools supporting ocl is growing but still small. The object constraint language ocl is a declarative language describing rules applying to. Ocl is a strongly typed and side effectfree specification language in which expressions are written in a declarative form. The package is installable in gnu octave and offers opencl support for parallelization of numerical computations.
In modeldriven software engineering, the presence of crosscutting constraints makes it difficult to maintain constraints defined on the models of largescale industrial systems. 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. 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. 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. Object constraint language ocl part of the uml standard formal speci.
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. The textbook and the accompanying materials posted on this website are freely available for fair use. Software architecture and design teaches the principles and concepts involved in the analysis and design of large software systems. 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.
Functional testing using ocl predicates to improve software quality. 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. Software engineering is the systematic application of engineering approaches to the development of software. Uml ocl class diagrams provide highlevel descriptions of software systems. In this work, we improve our previous work on aspectocl, which is an extension of ocl that allows modeling of crosscutting constraints. Advanced topics in software engineering research, including techniques used in the modeling and analysis of complex systems course objectives. Formal specificationbased testing is one of the major criterions to detect faults in the requirement specification or design of a system. Advanced uml modeling beyond csi5324, which includes modeling techniques using ocl, profiles, patternsaspects, etc. Each ocl expression indicates a value or object within the model that conforms to a type, e. This paper makes an investigation into the recent developments and explores the role of ocl in the current scenario and its future applications.
Introduction to ocl tutorial given at the sfm12 summer school learn. Generally, ocl constraints are written manually, which may. In particular, metamodels become a central artifact in the process, and are supported by various other artifacts such as editors and transformation. 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. Umlocl class diagrams provide highlevel descriptions of software systems. 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. 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. Aug 23, 2018 modeldriven engineering mde enables the rise in abstraction during development in software and system design. Since then, ocl has become a key component of any modeldriven engineering mde technique as the default language for expressing all. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Software engineering practice in industry, related to the design and commissioning of large software systems.
Automating java program testing using ocl and aspectj. For the love of physics walter lewin may 16, 2011 duration. Modeldriven engineering mde enables the rise in abstraction during development in software and system design. 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. Metrics, project management, costing, marketing, control, standards, case tools and bugs. Software specification problem, unified modeling language uml, object constraint language ocl. Object constraint language ocl tutorial modeling languages. It is also considered a part of overall systems engineering. Ocl is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms. Over the years, a new trend of approaches has emerged advocating languages, standards,toolsandwellde. 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. Citeseerx articulating and enforcing authorisation policies. Object constraint language ocl is a standard language defined by object management group for specifying constraints on models.
Citeseerx ocl constraints automatic generation for uml. 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. Lecture 1 introduction to software engineering youtube. In research, the institute supports both fundamental and applicationoriented research in all areas. 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 than low level details.
Softwareengineering ocl linaye introduction constraints contextandself invariant preandpostcondition constraintsonattributes. In order to define constraints, invariants, and queries on modeldriven artifacts, a generic. At the modeling level m1 ocl allows for the precision needed to write executable models. Functional testing using ocl predicates to improve.
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. Initially, ocl was merely a formal specification language extension for uml. Teaching uml and ocl models and their validation to. In this episode were talking to anneke kleppe about modeldriven software development and language engineering. At the metalevel m2, queries, views and transformations are subjects that will be vital to the success of the. To further provide refined description of uml, ocl is primarily and widely employed. Teaching uml and ocl models and their validation to software engineering students. Advances in applications of object constraint language for. 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.
The ocl end user sdk feature provides the classic ocl support with distinct ecore and uml apis. 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. In order to define constraints, invariants, and queries on modeldriven artifacts, a generic language has been developed. Softwareengineering ocl linaye softwareengineeringocl. Abstractas a standard modeling language of software architecture design, uml lacks formal semantics on account of its informal graphical notation. 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. Introduction modeldriven engineering mde is a prominent area in the software engineering.
The whole software design process has to be formally managed long before the first line of code is written. Ocl is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms the free dictionary. 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. This paper makes an investigation into the recent developments and explores the role of ocl. Automated refactoring of ocl constraints with search.
Department of computer science, institute for software and multimedia technology. When ocl constraints evolve regularly, it is essential that they are easy to understand and maintain. Eclipse ocl has open bugs and a newsgroup or forum. 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. In order to distinguish them, the parentheses after the name of an operation is required. Teaching uml and ocl models and their validation to software. Looking for online definition of ocl or what ocl stands for. Ocl makes a metaobject facility model more precise by associating assertions with its metaelements. For instance, in cancer registries, to ensure the quality of cancer data, more than one thousand. Object constraint language ocl constraints are typically used to provide precise semantics to models developed with the unified modeling language uml. Wolfgang reif, is a scientific institution within the faculty of applied computer science of the university of augsburg.
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