| Directive
| Description
|
| USE usefile-name [,directory] [,start-key]
| Inserts code from a usefile into the program being compiled (a synonym for INCLUDE)
|
| INCLUDE include-filename [,directory] [,start-key]
| Inserts code from an include file into the program being compiled
(a synonym for USE)
|
| ENDUSE
| Placed at the end of a usefile
|
| SET symbolic-constant = integer-constant
| Sets the value of a symbolic constant
|
| SET symbolic-constant$ = "string-constant"
| Sets the value of a string symbolic constant
|
| UNSET symbolic-constant
| Clears a symbolic constant
|
| .IF symbolic-constant
| Start of conditional compliation section
|
| .IFDEF symbolic-constant
| Start of conditional compliation section (if symbolic constant has been defined)
|
| .IFNDEF symbolic-constant
| Start of conditional compliation section (if symbolic constant has not been defined)
|
| .ELSE
| Alternate conditional compliation section
|
| .ENDIF
| End of conditional compliation section
|