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Mandatory.

Specify the identifier that is to be assigned to the new function.

Rules

IBM i: A function identifier must be unique within the process it is created. It is possible to have two functions with the same identifier in a single partition if they are located in different processes.

Windows: Function identifier must be unique in the partition. All functions must be defined as type *DIRECT.

Certain function identifiers are reserved for use by LANSA and cannot be specified as valid function identifiers. These are:

Name	Reserved Meaning / Description
MENU	Display process main menu
EXIT	Exit from LANSA
HELP	Display process HELP text
SELECT	Select next function from list of allowable function
EOJ	End all batch processing
ERROR	Abort process with an error
RETRN	Return control to calling process or function
*ANY	Any function identifier

For more details of why these names are reserved, refer to 6.2 Function Control Table.

What is a Function in the Developer's Guide

Create Functions in the User Guide