FSCB - Current® primary index record control block

   Name : DCLFSCB

   Function:
   This module contains the declarative of the FSCB structure which maps a generic record of the VSAM file
   constituting the primary index inside the database of the data store. It is used each time that an internal
   module of the data store requires a physical direct access to the primary index.
   Inside the module, you can distinguish the primary key of the SYSOUT, that is, the key of the KSDS:
      Jobname
      Execution date
      Execution time
     SYSOUT identifier
   Other data comprise:
      Structured and unstructured datafile number
      Structured and unstructured datapage RBN (relative block number)
      Structured and unstructured datapage total number
   A set of these three elements (separately for structured and unstructured data) constitutes the
   coordinates used to correctly locate the data portion of the SYSOUT, inside both a structured and
   unstructured datafile.
   Finally, to complete this structure, there is the secondary SYSOUT key. This comprises:
      Occurrence token
      Operation number
   These data form the operation token representing, inside the cleanup and restart local data store,
   the alternative key to get a job log. A filler for future use closes the structure.