Application Components

The application comprises a program, two tasks, a map, and a subschema:

Program—The EMPDISP program either performs a MAP OUT to start a session or performs a MAP IN, database access, and a MAP OUT.
Tasks—The task codes EMPDISP and EMPDISP2 affect the program flow of control:
- EMPDISP causes the program to perform the FIRST_TIME portion of the program, mapping out the empty screen.
- EMPDISP2 causes the program to perform the SECOND_TIME portion of the program, mapping in the data, checking the AID byte, performing the database access portion of the program, and mapping out either an error message or employee data.
Map—The application uses a map named EMPLMAP to communicate with the terminal operator. The following illustrates the EMPLMAP map.
```
            *** EMPLOYEE INFORMATION SCREEN ***

        EMPLOYEE ID:

        FIRST NAME:
        LAST NAME :

        ADDRESS:
           :
           :    :












      TYPE AN EMPLOYEE ID AND PRESS ENTER ** PRESS PA1 TO EXIT
```
The EMPLMAP definition specifies:
- Six literal fields (including the title EMPLOYEE INFORMATION SCREEN).
- Seven variable data fields, to contain: EMPLOYEE ID, LAST NAME, FIRST NAME, and ADDRESS.
- Automatic editing for the EMPLOYEE ID field specifies that the field is in error if the ID you entered does not comply with the field's external picture (PIC 9(4)).
- Messages are output in the $MESSAGE field.
Subschema—The application uses the EMPSS01 subschema.