Some of the benefitsof using a UML for OO development include a clearer understandingof system requirements; a straightforward transition fromrequirements into design activity; and consistency, ...

Several design patterns are defined to make systems more flexible and extensible. The main goal of this work is to show how the representation of these kind of patterns, which we refer to as ...

OOS (Object-Oriented Systems) facilitate the change in the system in order to improve the functionality of the system. UML (Unified Modeling Language) as ...

UML 2 is a widely accepted object-oriented analysis and design notation. UML includes the OCL 3 that is used to specify all kinds of constraints over components in the constituent models. In this ...