The base application

The base application, with its 3270 user interface, provides functions with which you can list the contents of a stored catalog, select an item from the list, and enter a quantity to order. The application has a modular design which makes it simple to extend the application to support newer technology, such as Web services.

Figure 1shows the structure of the base application (for a detailed description of the application see Description of the catalog manager application).
Figure 1. Structure of the base application
Diagram showing the structure of the base application.