Chapter 3 Building Conceptual Data Models

Designating a primary identifier

A primary identifier is an identifier that has been designated as the main identifier for the entity. It generates a primary key in a PDM.

To designate a primary identifier:

1. Open the property sheet of an entity and click the Attributes tab.
2. Select an identifier from the list and then click the Properties tool to open the identifier property sheet..
   
3. Select the Primary Identifier check box and click OK to return to the entity property sheet. The P column is selected for the new primary identifier.
   
   
      Item not visible in list
   To make an item visible in a list, click the Customize Columns and Filter tool in the list toolbar, select the appropriate check box from the list of filter options that is displayed, and click OK.
   
   

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