OJOB (job_ID) or
OJOB (jobnr, tag) or
This function will return the job_id of the ‘owner’ of the given job. Normally the owner of a job is the job which initiated it. So, if job 1 creates job 2 then job 1 is the owner of job 2. However, because jobs can execute other jobs without becoming their owner, generally the owner of a job is the job that will kill that job when it itself is removed. A negative job_ID points to the job which calls OJOB.