Setting a application item using a dynamic action.
An application item is not rendered on a page. So changing the value of an application item needs to be done on the server.
In this case a dynamic action of type "execute PL/SQL code" is used.
The code is
:f_test_date := :p13_date;
To show that the value of the application item has changed a dynamic action of type "Set Value" of "PL/SQL Expression" with the following code:
:F_TEST_DATE