Information Modeling and Relational Databases, 3rd Edition

6 Value, Set-Comparison, and Subtype Constraints

Abstract

This paragraph discusses step 6 of ORM’s conceptual schema design procedure. It reviews basic set theory and covers value constraints, independent object types, set-comparison constraints, subtyping, and generalization of object types.

Keywords

ORM; Set theory; Value constraint; Independent object type; Subset constraint; Equality constraint; Exclusion constraint; Subtyping; Object type generalization

Chapter Outline

• 6.1 Introduction to CSDP Step 6
• 6.2 Basic Set Theory
• 6.3 Value Constraints and Independent Types
• 6.4 Subset, Equality, and Exclusion Constraints
• 6.5 Subtyping
• 6.6 Generalization of Object Types
• 6.7 Summary

6.1 Introduction to CSDP Step 6

So far, we have learned how to verbalize ...