CONTENTS v CONTENTS Preface .......................................................................................................... xi Part 1 MOTIVATIONS AND NOTATIONS Chapter 1 Introduction..........................................................................................03 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Some Questions about Data Models.................................................. 03 Purpose ................................................................................................. 04 Target Audience ................................................................................... 05 What Is a Data Model?......................................................................... 05 Why Do We Do Data Models?............................................................. 05 Approach to Data Modeling ................................................................ 07 Structure of This Book ......................................................................... 07 Chapter 2 Entity Relationship Model Basics..................................................09