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Part 2: Disorders The following incomplete list of business rules describe the relationships between some of the different types of disorders to the...
Part 2: Disorders
The following incomplete list of business rules describe the relationships between some of the different types of disorders to the human body.
1. Thoracic disorders can be hernias, spine injuries, or neither.
2. Musculoskeletal disorders and gastrointestinal disorders are all disorders, but not all disorders are musculoskeletal or gastrointestinal.
3. Knee disorders are patellar dislocations, knee dislocations, Plica syndrome, or none of these.
4. Structural gastrointestinal disorders can be diverticulosis, colitis, or neither.
5. Gastrointestinal disorders must be either functional gastrointestinal disorders or structural gastrointestinal disorders.
6. Thoracic disorders and knee disorders are musculoskeletal disorders.
7. Constipation and irratible bowel syndrome are functional gastrointestinal disorders.
All relationships described in these rules are specialization-generalization relationships. These rules also reflect the entities and relationships that exist in the real-world.
1. Create a complete list of business rules that are consistent with the incomplete list given above. Try to order the rules logically, either starting at the bottom of the hierarchy working upward, or from the top of the hierarchy working downward. This list should make provision for all entities and relationships given in the above list, and there are many solutions that do so.
2. Develop an extended entity-relationship diagram (EERD) that illustrates the relational database design described by the business rules in #1. The diagram should include the primary key of each table in order to demonstrate correct implementation of specialization-generalization. While EERDs may well contain other attributes, in this assignment you need not include them because they are not described in the business rules. You should use legal database identifiers such as Thoracic_disorder or Colitis in your EERD.
