This phrase specifies the collating sequence to be used in nonnumeric comparisons for the KEY data items in this sorting operation.
When the COLLATING SEQUENCE phrase is omitted, the PROGRAM COLLATING SEQUENCE clause (if specified) in the OBJECT-COMPUTER paragraph specifies the collating sequence to be used.
When both the COLLATING SEQUENCE phrase and the PROGRAM COLLATING SEQUENCE clause are omitted, the EBCDIC collating sequence is used.
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