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After completing the object schema, make sure no information has been lost. To do this, check the derived class hierarchy against the original views defined in the relational schema.

When checking the hierarchy, remember that class hierarchies explicitly maintain the types of data so it is  not necessary to have type codes. See type codes.

Next: Support View equivalent from the class hierarchy. Also see the related content below.

Related Articles

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More on the general topic: Using Existing Relational Schema

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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

Web Services, Service-Oriented Architectures, and Cloud Computing: The Savvy Manager's Guide (Second Edition)

by 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.