The parameters used by MULTIRD are addressed in the linkage section of the program, as follows:
LINKAGE SECTION .
COPY VIDIRDC .
COPY APPLCTL .
*
01 DB2-RECORD-KEY .
02 DB2-OBJECT-ID PIC X(6) .
02 DB2-REC-TYPE PIC X(3) .
02 DB2-USER-ID PIC X(8) .
VIDIRDC is the copybook that defines the parameters passed by CICS® VT. APPLCTL is the copybook for the APPLCTL file.