Since the first OMG specification of the Unified Modeling Language (UML), the Object Constraint Language (OCL) has been used for the definition of well-formedness rules in the UML specification. These rules have been specified within the early OCL years, when no appropriate tooling existed. Thus, they could not be checked for syntactical and static semantics correctness. In this paper we presen...

UML is a complex language with many modeling features. Especially the modeling of static structures with class diagrams is supported by a rich set of description primitives. We show how to transfrom UML class diagrams involving cardinality constraints, qualifiers, association classes, aggregations, compositions, and generalizations into equivalent UML class diagrams employing only n-ary associa...

Executable UML allows precisely describing the software system at a higher level of abstraction. The executable models can be translated to a less abstract programming language completely or executed directly. Object Constraint Language (OCL), as a formal specification language, is a standard published along with UML. It is primitively used to describe constraints for UML models. In this paper,...

The Unified Modeling Language (UML) is accepted today as an important standard for developing software. UML tools however provide little support for validating and checking models in early development phases. There is also no substantial support for the Object Constraint Language (OCL). We present an approach for the validation of UML models and OCL constraints based on animation and certificat...

The Uniied Modeling Language UML is a language for specifying , visualizing and documenting object-oriented systems. UML combines the concepts of OOA/OOD, OMT and OOSE and is intended as a standard in the domain of object-oriented analysis and design. Due to the missing formal, mathematical foundation of UML the syntax and the semantics of a number of UML constructs are not precisely deened. Th...

We present a metamodel-based approach for specifying uml notations for domain-specific modeling languages. Traditionally, domain specific languages are either defined by uml profiles or using metamodels. We provide a generic integration of these two methods supporting arbitrary uml profiles and metamodels. Our approach provides a bidirectional mapping between the uml notation and the metamodel ...

A key aspect of successfully using UML is understanding the semantics of the notations. UML 2 will increase the already substantial collection of notations supported by UML 1.x. At the same time, this will augment the difficulty users experience in understanding semantics. In this paper we propose that while the diverse notations may render concepts differently, the concepts can often be consid...

This study is concerned with the developing criteria for learning the semantics of UML models in an intelligent tutorial system. This is achieved by going through literature and studying the current approaches for checking the semantics of UML diagrams. This paper concerns with the ability of learning the semantics of UML models using formal methods, For this reason this research enhance an exi...

The topic of UML model consistency is becoming increasingly important. Having a tool that checks the consistency of UML models is very useful. Using the XMI standard, the consistent models can be transferred from the checker tool to any other UML tool. By means of practical examples, this paper shows that using a framework based on OCL is a valuable approach when checking UML models. The result...

UML class diagrams can be used as a language for expressing a conceptual model of a domain. We use the General Ontological Language (GOL) and its underlying upper level ontology, proposed in [1], to evaluate the ontological correctness of a conceptual UML class model and to develop guidelines for how the constructs of the UML should be used in conceptual modeling. In particular, we discuss the ...