Unified Modeling Language

Summary

The unified modeling language (UML) is a general-purpose visual modeling language that is intended to provide a standard way to visualize the design of a system. UML provides a standard notation for many types of diagrams which can be roughly divided into 3 main groups: behavior diagrams, interaction diagrams, and structure diagrams. The creation of UML was originally motivated by the desire to standardize the disparate notational systems and approaches to software design. It was developed at Rational Software in 1994–1995, with further development led by them through 1996. In 1997, UML was adopted as a standard by the Object Management Group (OMG), and has been managed by this organization ever since. In 2005, UML was also published by the International Organization for Standardization (ISO) as an approved ISO standard. Since then the standard has been periodically revised to cover the latest revision of UML. In software engineering, most pract

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https://en.wikipedia.org/wiki/Unified_Modeling_Language

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Using OCL and UML to Specify System Behavior

Shane Sendall

Use cases are an excellent tool for capturing behavioral requirements of software systems, but they are not an ideal work product for driving design activities. We believe that there is value from complementing use case descriptions with pre- and postcondition descriptions, not only to better support reasoning about system properties and a basis for testing and debugging, but also to better support a predictable decomposition level on which one can base a systematic transition to design. Nevertheless, we recognize that pre- and postcondition descriptions are not widely used in practice. We believe this is in part due to the formalism used. Either the formalism is too heavy to learn and use, or the formalism does not offer sufficient abstraction from the vocabulary of implementation. Via an example, the paper highlights our approach for specifying system behavior, which uses the Unified Modeling Language (UML) and its Object Constraint Language (OCL). We focus the paper on pre- and postconditions descriptions and in particular propose a number of enhancements and interpretations to OCL that we made while refining our approach. In particular, we describe a number of issues that cover areas such as the frame problem, incremental descriptions, structuring schemas, and events and exceptions.

Springer Verlag2002

This thesis presents the structural organization, theoretical foundations and basic application principles of Triune Continuum Paradigm, an original paradigm applicable to object-oriented modeling. The paradigm defines a metamodeling structure efficient in the scope of general system modeling, in particular for object-oriented frameworks. This structure is rigorous and at the same time flexible. It allows the definition of formal ontologies for various specific object-oriented frameworks, for example for "Unified Modeling Language" (UML) or for "Reference Model of Open Distributed Processing" (RM-ODP is an ISO/ITU standard). Thus different existing frameworks, like UML or RM-ODP, can benefit from the logical rigor, internal consistency, interpretation coherency, formal presentation and solid theoretical foundations of the defined paradigm. Adoption of this paradigm allows the resolution of crucial problems existing in these different object-oriented frameworks. The paradigm is formally presented and realized in a computer-interpretable form on the example of ontology describing the RM-ODP conceptual framework. Thus the paradigm realizes an important result that was never achieved previously: a single consistent formalization of the RM-ODP standard conceptual framework. This formalization presents a concrete example of formal ontology for general system modeling. The paradigm is also applied on UML. This application allowed the presentation of theoretical foundations that are necessary for the understanding and definition of the UML metamodel. This thesis is useful to readers who are interested in the fundamentals of system analysis. It can be particularly interesting to the UML semantics specialists, to the RM-ODP experts, and to ontological engineers.

EPFL2002

Triune Continuum Paradigm: a paradigm for General System Modeling and its applications for UML and RM-ODP

Andrey Naumenko

This thesis presents the structural organization, theoretical foundations and basic application principles of Triune Continuum Paradigm, an original paradigm applicable to object-oriented modeling. The paradigm defines a metamodeling structure efficient in the scope of general system modeling, in particular for object-oriented frameworks. This structure is rigorous and at the same time flexible. It allows the definition of formal ontologies for various specific object-oriented frameworks, for example for Unified Modeling Language (UML) or for Reference Model of Open Distributed Processing (RM-ODP is an ISO/ITU standard). Thus different existing frameworks, like UML or RM-ODP, can benefit from the logical rigor, internal consistency, interpretation coherency, formal presentation and solid theoretical foundations of the defined paradigm. Adoption of this paradigm allows the resolution of crucial problems existing in these different object-oriented frameworks. The paradigm is formally presented and realized in a computer-interpretable form on the example of ontology describing the RM-ODP conceptual framework. Thus the paradigm realizes an important result that was never achieved previously: a single consistent formalization of the RM-ODP standard conceptual framework. This formalization presents a concrete example of formal ontology for general system modeling. The paradigm is also applied on UML. This application allowed the presentation of theoretical foundations that are necessary for the understanding and definition of the UML metamodel. This thesis is useful to readers who are interested in the fundamentals of system analysis. It can be particularly interesting to the UML semantics specialists, to the RM-ODP experts, and to ontological engineers.

2002