In this chapter, we described four important data models and their properties: enterprise, conceptual, logical, and physical. In the following table, summarize the important properties of these data models by entering a Y (for yes) or an N (for no) in each cell of the table.

Table for Problem and Exercise 1-49 All Entities? All Attributes? Technology Independent? DBMS Independent? Record Layouts?

Enterprise Conceptual Logical Physical Field Exercises extensive information systems department and set of information system applications. You should choose one with which you are familiar, possibly your employer, your university, or an organization where a friend works. Use the same organization for each question.