The object constraint language ocl started as a com plement of the uml notation with the goal to overcome the limitations of. By using ocl, constraints and queries can be speci ed in a formal yet. About the object constraint language specification version 2. Section 4 is about the adequate formal language for odp type descriptions. Scribd is the worlds largest social reading and publishing site.
Object constraint language object management group. Cest avec ocl object constraint language quuml formalise lexpression des contraintes. This specification represents the convergence of best practices in the objecttechnology. Examens corriges object constraint language ocl une. Uml unified modeling language is a standard language for specifying, visualizing, constructing, and documenting the artifacts of software systems. Ocl as specification language for object constraints. Pdf object constraint language ocl famma faissal and.
Atlas transformation language atl user manual version 0. Object constraint language ocl object constraint language. An ocl expression is valid if it is written according to the rules formal grammar of ocl. 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. This paper presents our view on modelling constraints, in which we distinguish three different stages.
The unified modeling language uml provides system architects working on object analysis and design with one consistent language for specifying, visualizing, constructing, and documenting the artifacts of software systems, as well as for business modeling. Object constraint modelbased assertion dldf fllwarmer and kleppe define a constraint as follows. Magicdraw no magic, inc unified modeling language uml. Fakultat informatik, institut smt, lehrstuhl softwaretechnologie. Object constraint language omg05eocl is a typed formal language in. An important rule is that an ocl expression always evaluates to a specific object of a specific type.
Founded in 1989, omg standards are driven by vendors, endusers, academic institutions and government agencies. The automated extraction of high resolution 3d building models from imagery and laser scanner data requires strong models for all features which are observable at a large scale. Its also not a book on capability maturity models cmm, classresponsibilitiescollaborators crc cards, decision representation language drl, extreme programming xp, gantt charts, issuebased information systems ibis, joint appication design. For instance, typecasting with oclastype to a type that the object does not support or getting the first element of an empty collection will result in undefined. Uml was created by the object management group omg and uml 1. Memento du langage ocl object constraint language v1. Developer studio 2006 delphi for microsoft win32 delphi for the microsoft. Every ocl expression indicates a value or object within the system. Part of the latest uml proposal is the object constraint language ocl. The paper therefore puts forward a framework for modelling constraints comprising 1 a classification and clarification of constraints, 2 a formal description using the unified modelling languageobject constraint language umlocl and 3 implementation characteristics. Properties can be combined to make more complicated expressi ons. After obtaining a result, one can always apply another property to the result to get a new result value.
Object constraint language ocl pure expression language. Architecting software systems using model transformations. Practicing systems engineers interested in system modeling. Ocl object constraint language ocl is a formal language used to express constraints. Therefore, each ocl expression can be read and evaluated lefttoright. Modelchecking is a highly automated formal method that has found. Extending ocl for olap querying on conceptual multidimensional models of data warehouses article in information sciences 1805. Contraintes exprimees avec ocl object constraint language. Ocl is typically used to specify invariant conditions that must hold for the system being modeled. Understanding ocl with reference to sql part 1 youtube. A constraint is a restriction on one or more values a constraint is a restriction on one or more values of part of an objectoriented model or system. The object constraint language, second edition, utilizes a case study to show how to exercise these compact but powerful expressions for. The object management group omg is an international, open membership, notforprofit technology standards consortium. Le delf livre b2 amp cd abebookscom reussir le delf livre b2 amp cd dalf ciep fsitutorialansyspdfsdocuments com pdf.
The object constraint language ocl started as a complement of the uml notation with the goal to overcome the limitations of. The object constraint language ocl is a specification language which. Cours omg unified modeling language specification cours. Modelbased assertion dldf fllwarmer and kleppe define a constraint as follows. It consists of a modelchecking framework for the object constraint language ocl, which is a integral part of the uml standard. Ocl object constraint language part of the uml standard.