This image shows a sample class diagram for a database query operation for the Address Book Query Processor business service. In the upper left-hand corner, Address Book Query Processor is shown extending the foundation Business Service class.

The focus of this image shows value objects extending the Value Object foundation class. This image shows the value objects along with their fields (note, the fields for each value object are not identified in this description.) The value objects are: Internal Get Address Book, Internal Show Address Book, and Internal Get Address Book Where Fields.