Description of the illustration adobj030.eps

The figure represents the flat storage model, in which all the views in the hierarchy are based on the same table.

The table in the illustration is AllPersons, which contains the typeids and the attributes for the person, student, and employee types. The person attributes are also contained in the Person_v, Student_v, and Employee_v views. In addition, Student_v contains student attributes and Employee_v contains employee attributes.