You can specify JOBKEY at the job level only by placing the statement after the JOB statement and before the first EXEC statement in the job.
If you have a set of jobs that have the same steps and data sets but the job names change each time a job is submitted, you can use the JOBKEY statement to provide a static name to store and retrieve the history for each job.
The label value is a string containing up to eight characters (letters A-Z, numbers 0-9, $, #, or @). The first character cannot be a number. Lowercase characters are converted to uppercase.
The JOBKEY statement has the following syntax:
//*BSLCNTL JOBKEY label