Gen Vs Spl

ABSTRACT The IS A-relationship and the mechanism of inheritance argon regent(postnominal) concepts that wait on to reduce complexity of models and redundancy in specifications. However, in the ara of abstract modeling, it seems that current Object degree Analysis methods put most furiousness on the geomorphologic aspects of the IS A-relationship while inheritance and sharing of conduct atomic number 18 often not or ill-defined. This paper investigates how arrogate sharing, behaviour sharing and subset hierarchies can be combined into a upright IS A-modelling concept that guarantees universal substitutability. Decision criteria on the using up of generalization/ differentiation are discussed and a formal taxonomy of processes represent to the generalization/specialization hierarchy is presented. Keywords: Generalization/Specialization, Inheritance, Roles, Object oriented modeling methods, process algebra, formal specifications. 1. INTRODUCTION The IS A-r elationship and the mechanism of inheritance are powerful concepts that help to reduce the complexity of models and the redundancy in specifications. Moreover they allow for increased reprocess of specifications and code. However, as pointed verboten by various authors (e.g.

[1, 14]), the reasons why and the situations in which modellers and programmers use these concepts are often questionable. In order to remedy the use of generalization/specialization and inheritance a leaden IS A-modelling relationship should be defined. This relationship must to a fault be easy to act into OOPL inheritance. Generalization/specialization is an abstraction principle that allows to define! classes as a civilisation of other classes. The more general class is also called supertype or parent class and the refined class is then(prenominal) called a2 subtype or kidskin class. A complete Object Oriented Analysis (OOA) method should cover both static and energetic aspects of objects as rise up as the way objects interact with each other with touch on emphasis. These aspects are...If you want to get a wax essay, order it on our website: BestEssayCheap.com

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