Oracle9i Application Developer's Guide - Object-Relational Features is intended for programmers developing new applications or converting existing applications to run in the Oracle environment. The object-relational features are often used in multimedia, Geographic Information Systems (GIS), and similar applications that deal with complex data. The object views feature can be valuable when writing new applications on top of an existing relational schema.
This guide assumes that you have a working knowledge of application programming and that you are familiar with the use of Structured Query Language (SQL) to access information in relational database systems.