For ASCII files, the ASSIGN clause assignment-name has
the following format:

Format: assignment-name for QSAM files
>>-+--------+--+----+--name------------------------------------><
'-label--' '-S--'
The file must be a QSAM file assigned to a magnetic tape device.
- label-
- Documents the device and device class to which a file is assigned.
If specified, it must end with a hyphen.
- S-
- The organization field. Optional for QSAM files, which always have sequential
organization.
- name
- A required one-character to eight-character field that specifies the external name
for this file.