Indicates that each logical record in the data
set begins with a carriage control character, which must be identified
in the DD statement, DCB macro, or data set label. You might identify
these carriage control characters in the DD statement through the
DCB subparameter in the RECFM of the data set as being A (ASA) or
M (machine). The carriage control characters are given in z/OS DFSMS Using Data Sets.