About Page Processing

Page processing is the process of submitting a page. A page is typically submitted when a user clicks a button. Use the Page Processing section of the Page Definition to specify application logic such as computations, validations, processes, and branches. In general, the Application Express engine runs this logic in the order it appears on the Page Definition.

The sections that follow describe each subsection under Page Processing.

Topics:

Computations
Validations
Processes
Branches

Computations

Computations are units of logic used to assign session state to items and are executed at the time the page is processed.

See Also:

"Understanding Page Computations"

Validations

Validations enable you to create logic controls to verify whether user input is valid. For example, a validation can check whether a date entered into a target completion date field is in the future.

Processes

Processes are logic controls used to execute data manipulation language (DML) or PL/SQL. Processes are executed after the page is submitted.

See Also:

"Understanding Page Processes"

Branches

Branches enable you to create logic controls that determine how the user navigates through the application.