1 OPEN
2+ ,
2 %options-group
3 ;

options-group:

1 FILE(file-reference)
2! STREAM
2?
2 RECORD
3! INPUT
3?
3 OUTPUT
3 UPDATE
4! SEQUENTIAL
4.1! BUFFERED
4.1?
4.1 UNBUFFERED
4?
4 DIRECT
4.1! UNBUFFERED
4.1?
4.1 BUFFERED
5? KEYED
6? PRINT
7? TITLE(expression)
8? LINESIZE(expression)
9? PAGESIZE(expression)