... 22 Activity 5.1: Identifying Keys in the Logical Model Exercise 1: Identifying Keys In this exercise, you will identify primary, foreign, and composite keys for a logical data model based on the ... Bardell, Inc case study ! Specify the keys in a logical data model Review the ER diagram on the next page Identify the areas of the ER diagram for which keys are necessary Write the keys in the space ... define the composite key, and then label their types as Primary or Foreign Next, you will discuss your answers with the class Activity 5.1: Identifying Keys in the Logical Model 23 Contract Contracts...