Figure 1. BKPTDSN Format
The BKPTDSN PARM is used to change the prefix of the data set names for the output of the individual sorts and intermediate merges. TDS. is the delivered default. The last character of the prefix must be a period. If the TIMESTMP option was specified at installation time, up to 21 characters may precede that period. Otherwise, up to 31 characters may be specified before the final period.