SORT FIELDS=(55,8,AQ,A)
 ALTSEQ   CODE=(81C1,82C2,83C3,84C4,85C5,86C6,87C7,
          88C8,89C9,91D1,92D2,93D3,94D4,95D5,96D6,
          97D7,98D8,99D9,A2E2,A3E3,A4E4,A5E5,A6E6,
          A7E7,A8E8,A9E9)

Each lowercase letter is to collate at the same position as the corresponding uppercase letter. For example, the lowercase a (X'81') is to collate at the same position as the uppercase A (X'C1'). This results in case-insensitive collating.