LINKAGE TYPE Clause - Format

1 LINKAGE (1) 
2? TYPE
3? IS
4 environment-name-3
4 PROGRAM
4 PROCEDURE
5 FOR
6+ 
6 literal-7
6.1? USING
6.1.1 %linkage-arguments

linkage-arguments:

1+ 
1.0 ALL
1.0+ 
1.0 integer-1
1.0.1? 
1.0.1.0 THRU
1.0.1.0 THROUGH
1.0.1.1 integer-2
1.1? 
1.1 IS
1.1 ARE
1.2 DESCRIBED