Description: Indicates what printer sub-systems are currently processing this print job. The last OID field for this dynamic object contains the job ID. cSourceSubsystem - some of the job is in the printer I/O subsystem. cProcessingSubsystem - some of the job is in the printer imaging processing subsystem. cDestinationSubsystem - some of the job is being printed. Additional information: For $product_str, cSourceSubsystem and cProcessingSubsystem will always be set and cleared together. They are set when the beginning of the job is detected, and they are cleared when the end of the job is parsed. A non-printing job will never set cDestinationSubsystem. When a page is ready to be printed (the intermediate has been built and the page is `closed' by the personality), cDestinationSubsystem will be set even if a page of a previous job is currently being printed. cDestinationSubsystem remains set until the last page of the job has finished printing. If a page requires extensive processing and allows all the previous pages of a job to complete printing, cDestinationSubsystem will remain set until the last page of the job has finished printing.