1 INITIAL  (
2+ ,
2 %item
3 )
4 %item:
5 *
5 %initial-constant
5 reference
5 (expression)
5 %iteration-specification

iteration-specification:

1 (
2 iteration-factor
2 *
3 )
4 %iteration-item

iteration-item:

1 *
1 %initial-constant
1 reference
1 (
1.1+ ,
1.1 item
1.2 )

initial-constant:

1.0? 
1.0  + 
1.0  - 
1.1 arithmetic-constant
1 bit-constant
1 character-constant
1 graphic-constant
1 entry-constant
1 file-constant
1 label-constant
1.0? 
1.0  + 
1.0  - 
1.1 real-constant
1.2  + 
1.2  - 
1.3 imaginary-constant