Structurization and generalization, important distinction of object approach, is possible now and for database systems. This article illustrates benefit of combination both relational and object methods for database navigation.
First field is used for the key object, next fields - for it's attributes.
Generalization Client navigates in database by means of selecting the wanted attribute values. Big list of values, for example prices, complicate matters. As result, after importing previous structured tables, Sav Z navigator generates more constructive dialog making virtual tables. Z expression in tabular data Z language simplifies making table files. We can import the same tabular data that may be showed by distinct ways.