Return last entry specification - Key = '000D'

Code DINRTLST to determine if the relative entry request number, ddname, or dsname you specify is the last relative entry. When you code DINRTLST, # and LEN must be one, and PARM is a one-byte field. Upon return to your program, PARM contains one of the following values:
X'80'
Last relative entry
X'00'
Otherwise
Example: To request the return of the last entry indicator, code:
KEY    #      LEN    PARM
000D   0001   0001   -