Format 4: sort/merge file description entry

1  SD  ?  RECORD
2.1 ? CONTAINS ? CHARACTERS
2.1 ? CONTAINS  TO ? CHARACTERS
2.1  %clause 1?  DEPENDING? ON ?  DATA
2.1  RECORD? IS
2.1  RECORDS? ARE
1 +  ?  BLOCK? CONTAINS?   TO 
2.1 CHARACTERS
2.1 RECORDS?  LABEL
2.1  RECORD? IS
2.1  RECORDS? ARE
2.1 STANDARD
2.1 OMITTED
2.1 +  ?  VALUE OF +   ? IS
2.1 
2.1 ?  LINAGE? IS
2.1 
2.1 
1? LINES
1 %clause 2?  CODE-SET? IS   .