Declarative Objectivity (DO) Language : Rental Fleet Sample Schema
Rental Fleet Sample Schema
Most of the examples in the reference topics of this book are based on schema that could be used by an application that manages a fleet of rental vehicles.
  
 
The schema shows:
The main classes representing the rental company, its branch locations, customer accounts, rental contracts, vehicles, vehicle models, vehicle categories, and so on.
Relationships for linking objects of various classes to each other.
Inheritance relationships that enable the use of common code to track the different events when a vehicle is rented—typically reservation, pickup, and return.