All,
During my own sanity check of the initial draft I posted I noticed that I had accidentally removed the "job-mandatory-attributes" content from the errata update to PWG 5100.7. So please ignore yesterday's draft and instead look at today's:
https://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippjobext11-20180926.docxhttps://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippjobext11-20180926.pdfhttps://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippjobext11-20180926-rev.pdf
Again, the purpose of this errata update is to provide actual rationale, use cases, requirements, etc. for the attributes were originally defined in this specification and have been used/referenced by other specifications, and to obsolete everything else that doesn't work or poses interoperability and privacy issues.
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Michael Sweet, Senior Printing System Engineer