DOCUPRINT IPS SOLUTIONS GUIDE D-1D. DAFP print flowsThis appendix shows the AFP print flows for the differentenvironments supported by PSF. These print flows apply to both PSFand the DocuPrint IPS printers.Mainframe data flowsIn the mainframe environment, you may install PSF in threeoperating system environments: MVS, VM, and VSE. Theseoperating systems may run on either a System/370 or System/390mainframe. The following sections describe the AFP print flows foreach environment.MVS print flow1. JCL is submitted to JES.2. JES receives the job, then prepares and schedules the job forprocessing.3. JES passes control to the operating system for job execution.4. Output is spooled to a JES spool file.5. PSF acquires the job from the JES queue.6. PSF identifies and retrieves any necessary AFP resourcesstored on DASD. PSF then composes the data stream to IPDS.7. PSF directs the output to the printer. The IPDS printer thenprints the data.When PSF is finished, the job is purged from the JES queue.MVS print flow for a remote printer via PSF/21. JCL is submitted to JES.2. JES receives the job, then prepares and schedules the job forprocessing.3. JES passes control to the operating system for job execution.4. Output is spooled to a JES spool file.5. PSF acquires the job from the JES queue.6. PSF identifies and retrieves any necessary AFP resourcesstored on DASD. PSF then composes the data stream to IPDS.7. PSF directs the output to PSF/2 via VTAM. With PSF DIRECT,the document is routed directly to the printer and not spooled onPSF/2.