Description: Contains the printer assigned job identification for the job currently being processed by the processing PDL sub- system. The job ID is a monotonically increasing number. The job ID may be reset to zero at power-up and may roll over to zero after reaching some maximum value. Additional information: A value of -1 is returned when the printer is not parsing a job. When data for a new job is detected, this object is updated (the job may or may not turn out to be a Null Job); however, the trap does not occur until the printer determines that it is not a Null Job (a trapped value will differ from the previous value name or job attribute, causes no pages to be printed, by one or more). Some JOB-INFO- objects are created when the first data bytes are received. If the printer determines that the job is a Null Job, the JOB-INFO- objects related to the Null Job are deleted. Color LaserJet8550 retains the JOB-INFO- objects for the 24 most recent jobs that are not Null Jobs.