The indexed file (I in position 35) defined on this line is processed by character-record keys. (A numeric field used as the search argument is converted to zoned decimal before chaining.) The A entry must agree with the data format of the field identified as the key field (length in positions 29 to 33 and starting position specified as the parameter to the KEYLOC keyword).
The record-address-limits file (R in position 18) defined on this line contains character keys. The file being processed by this record address file can have an A, P, or K in position 34.