DFSORT's S-constants can use Dynamic system symbols, System-defined static system symbols and installation-defined static system symbols. I don't know if JOBID is available in that set. See the following for more information:
Frank Yaeger - DFSORT Development Team (IBM) - yaeger@us.ibm.com Specialties: JOINKEYS, FINDREP, WHEN=GROUP, ICETOOL, Symbols, Migration => DFSORT/MVS is on the Web at http://www.ibm.com/storage/dfsort