++PRLPLID  DS    CL4     EBCDIC 'PREL' FOR PARTREL
+PRLNGTH  DS    AL2     LENGTH OF PARAMETER LIST
+PRERRCDE DS    H       ERROR CODE RETURNED FROM
+*                        PARTIAL RELEASE
+PRLFLAG  DS    XL1     PARAMETER FLAG BYTE
+PRLPGM   EQU   X'00'   MODE=PGM (PROBLEM PROGRAM)
+PRLSUP   EQU   X'80'   MODE=SUP (SUPERVISOR STATE)
+PRLTIOT  EQU   X'40'   TIOT=NOENQ
+PRLNERAS EQU   X'20'   ERASE=NO
+PRLERASE EQU   X'10'   ERASE=YES
+PRLVCLOS EQU X'08'     VSAMCLLR=VSAMCLSE
+PRLVCNV  EQU X'04'     VSAMCLLR=NOTVSAM
+PRLBYPS  EQU X'02'     VSAMSEC=BYPASS
+PRLNBYPS EQU X'01'     VSAMSEC=NOBYPASS
+PRLFLAG2 DS XL1
+PRLVKSDS EQU X'80'     VSAMTYPE=KSDS
+PRLVESDS EQU X'40'     VSAMTYPE=ESDS
+PRLVRRDS EQU X'20'     VSAMTYPE=RRDS
+PRLVVRRD EQU X'10'     VSAMTYPE=VRRDS
+PRLVLDS  EQU X'08'     VSAMTYPE=LDS
+PRLEXTD  EQU X'04'     VSAMFMT=EXTD
+PRLSTD   EQU X'02'     VSAMFMT=STD
+PRLTIOTX EQU X'01'     No ENQ TEST when TIOT=NOENQ is specified
+PRLRSVD  DS XL2        RESERVED
+PRLDSN   DS A          DATA SET NAME POINTER
+PRLUCB   DS A          UCB POINTER
+PRLTRKS  DS A          ADDRESS OF NUMBER OF TRACKS RETURNED
                         (ONLY VALID FOR VSAM REQUESTS)
+PRLCTGR  DS F          CATALOG REASON CODE
+PRLEND   EQU   *       END OF PARAMETER LIST
+PRLENGTH EQU   PRLEND-PRELPL       LENGTH OF PARAMETER LIST