To specify that an alternate collating sequence is to be used, use the ALTSEQ(*SRC) keyword on the control specification. If you use the **ALTSEQ, **CTDATA, and **FTRANS keywords in the compile-time data section, the alternate-collating sequence data may be entered anywhere following the source records. If you do not use those keywords, the sequence data must follow the source records, and the file translation records but precede any compile-time array data.
If a character is to be inserted between two consecutive characters, you must specify every character that is altered by this insertion. For example, if the dollar sign ($) is to be inserted between A and B, specify the changes for character B onward.
See Appendix B. EBCDIC Collating Sequence for the EBCDIC character set.