Ddname specification - Key = '0001'

DCCDDNAM specifies the ddnames that are associated with the data sets to be concatenated. When you code DCCDDNAM, # is the number of ddnames being specified, which must be at least 2 and can be up to a maximum of 1635 (X'663'). LEN is the length of the immediately following ddname, up to a maximum of 8, and PARM contains the ddname.

Example: To specify concatenation of SYSLIB to MYLIB, code:
KEY    #      LEN    PARM         LEN    PARM
0001   0002   0005   D4E8D3C9C2   0006   E2E8E2D3C9C2