This figure illustrates what occurs in the mapping layer. The yellow lines show the mapping. Note, however, that the mapping lines do not connect directly to the color swatch objects. This represents that the join involving the "Size Color" table is creating the reference from the size objects to the color swatch objects. For more details on mapping, see related content below. Also see using existing relational schema to define objects.
More detail for the current topic: Mapping
More on the general topic: No Impedance Mismatch
Related Fact Book and Implementation Stories
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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.