>I don't think it is hidden information, I just found: >z/OS MVS Using the Subsystem Interface SA38-0679-00 >One chapter is called: Why Write Your Own Subsystem?
Yes, it is well documented how to write your own subsystem, and it is well documented, what functions you can support. What is missing is the whole set of functions that you need to support in order to make your own support for DD SUBSYS=. That was once documented in an orange book. >Each subsystem can deliver support for SUBSYS= in the JCL to handle DD >statements if it is useful, like Panvalet, Librarian, LOGR and others >mentioned. They have to document the interface for their SUBSYS= JCL parameter. Yes. For me this is proof enough that the interface itself will not disappear anytime soon, or more probably, never. But it does not help to write your own code and that is what the OP wanted, I understood. -- Peter Hunkeler ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
