The return code specifies the general result of the callable service. Appendix A. ICSF and TSS Return and Reason Codes lists the return codes.

The reason code specifies the result of the callable service that is returned to the application program. Each return code has different reason codes assigned to it that indicate specific processing problems. Appendix A. ICSF and TSS Return and Reason Codes lists the reason codes.

The length of the data that is passed to the installation exit. The length can be from X'00000000' to X'7FFFFFFF' (2 gigabytes). The data is identified in the exit_data parameter.

The data that is passed to the installation exit.

The number of keywords supplied in the rule_array parameter. This number must always be 1.

The 8 byte keyword that defines the action to be performed. The keyword must be LABEL-DL.

The 64-byte label of a record in the CKDS that is the target of this service. The record can contain an AES or a DES key token. The record pointed to by this label is deleted.