Maria Lourdes C. Capilitan

Sysanal(O0A)

August 15, 2008

Book Review

Systems Analysis and Design

(6^th Edition)

Kenneth E. Kendall

Julie E. Kendall

QA S88 K45 2005

Quote(Chapter 18): “Classes are represented by a rectangle on a class diagrams, it may include class name, attributes, interfaces, abstract and methods.”

Types of Classes

·        Entity Class

Represents real word items, represents on an entity-relationship diagram. Case tools such as Visible Analyst, that allows to create UML entity class from an entity on E-R diagram.

·        Boundary, Interface, or Class

It provides a means for users. There are two categories of interface classes the human and system.

The Human Interface should be prototyped and story board model is used to model the sequences of interactions. The System Interface involves sending data or receiving data from other system.

The External Interfaces are the least stable because there is often little or no control over the external partner. XML helps to provide standardization because it is been allow to a external partner to add new elements to XML document.

·        Abstract Class

Class that cannot be directly instantiated these are linked to concrete classes in generalization/specialization relationship.

·        Control Class

It is used to Control the flow of activities and they act as a coordinator when implementing classes. They are often derived during system design. Example of it was the log on process. It handles unique log on display, data may be passed to a more general validation control class.