<(DEFFLAG name [documentation])>
The flag name (a LISP symbol) is appended to the list of known flags. This statement should only appear in the master template header file, because the actual flags are defined there by VOOPS. The optional documentation string is transformed to a proper TAC documentation comment according to the VISTA documentation rules. Flags are actually #defined at execution of the ENDMODULE statement at the end of the master template header file, therefore no code is produced at execution of this statement.