A data model is a plan for building a database. To be effective, it must be simple enough to communicate the required data structure to the end user, yet detailed enough that the database designer can create the physical structure. IBM WebSphere Studio Application Developer (WSAD) Version 5.1 supports developing a logical data model and later exporting it to a database domain (like DB2, Oracle, and so on) to create a physical database. IBM Rational Application Developer (RAD) Version 6.0 introduces visual data model design. It supports three industry standard notations: IDEF1X, Information Engineering (IE or Crow's Foot), and UML (Unified Modeling Language). Using a feature-rich, simple, and user-friendly data palette tool, one can develop a complete data model with a few mouse clicks.
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