Adding the Person Class to the Hierarchy
After adding the Student Class to the hierarchy, redundant attributes between the Student and Employee Class, which were not addressed in the original relational schema, still exist. They can be factored out into a Person Class, as illustrated below.
Next: Object schema for relational schema. Also see the related content below.
More on the general topic: Multi-Type Views
- Teacher View
- Employee View
- Creating Class Hierarchy by Factoring Attributes
- Adding the Student Class to the Hierarchy
- Object Schema for Relational Schema
Related Fact Book
Author: Douglas K Barry
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The Savvy Manager's Guide
Douglas K Barry is also the author of a book that explains Web Services, service-oriented architecture, and Cloud Computing in an easy-to-understand, non-technical manner.
Web Services, Service-Oriented Architectures, and Cloud Computing: The Savvy Manager's Guide (Second Edition)
by Douglas K Barry with David Dick
This is a guide for the savvy manager who wants to capitalize on the wave of change that is occurring with Web Services, service-oriented architecture, and—more recently—Cloud Computing. The changes wrought by these technologies will require both a basic grasp of the technologies and an effective way to deal with how these changes will affect the people who build and use the systems in our organizations. This book covers both issues. Managers at all levels of all organizations must be aware of both the changes that we are now seeing and ways to deal with issues created by those changes.