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Second Level

Third Level

Fourth Level

Fifth Level

The Presentation Layer contains the services to support the application end user. This includes screen- and input-handling, such as menus, window navigation, graphical screen design, and mouse-activated actions.

· The Business Logic Layer implements business functions and business rules.

· The Data Layer handles access to the database, data manipulation and preserves data integrity.

The application development process using Oracle Designer and Headstart can best be described as a matrix.

It consists of 3 logical layers: the Data Layer, the Business Logic Layer, and the Presentation Layer.

For each of these layers, activities are performed during the Analysis Phase and the Design and Implementation Phase.

The remainder of this workshop is organized around this development approach matrix.

The application development process using Oracle Designer and Headstart can best be described as a matrix.

It consists of 3 logical layers: the Data Layer, the Business Logic Layer, and the Presentation Layer.

For each of these layers, activities are performed during the Analysis Phase and the Design and Implementation Phase.

The remainder of this workshop is organized around this development approach matrix.