START command processing when the member is a procedure
During START command processing, if the member specified does not start with a JOB statement, the system creates a JOB statement and EXEC statement that will invoke the procedure of the same name as the member.
For example, the member INIT exists in SYS1.PROCLIB as follows:
//IEFPROC EXEC PGM=IEFIIC
JES2 automatically issues the command S INIT.INIT,,,JES2,SUB=JES2 and
the following JCL is created:
//INIT JOB MSGLEVEL=1
//INIT EXEC INIT