INREC ==> Reformatted input record. We do not take complete record.We only take part of the record.
OUTREC=>Reformatted output record.This contains what are the input fields(in the sorted input) will have in the output file.
c:Specifies the column (byte) in which a data field or separation field should be placed, relative to the start of the record. If the column settings that are coded skip over any bytes, those bytes are filled with spaces.
Separation fld: Tells the sort/merge utility to insert a constant value into the record. The constant can be specified in one of these forms:
Nx: Inserts n repetitions of spaces
Nz: Inserts n repetitions of binary zeros
Nc’text’: Inserts n repetitions of the specified text
NX’hex’: Inserts n repetitions of the specified hex value
If n is omitted, one repetition of the specified constant is inserted.