Chapter 2 Conceptual Data Model Basics

CDM roles

The CDM allows you to:

• Represent the organization of data in a graphic format to create Entity Relationship Diagrams (ERD)
• Verify the validity of data design
• Generate a Physical Data Model (PDM), which specifies the physical implementation of the database
• Generate an Object-Oriented Model (OOM), which specifies an object representation of the CDM using the UML standard
• Generate a Conceptual Data Model (CDM), to create another model version in order to represent different design stages

For more information on ERD, see the following book Information Engineering , James Martin, Prentice Hall, 1990, three volumes of 178, 497, and 625 pages respectively

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