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Sep 11, 2020 by Smith Kennedy
Internet Printing Protocol (IPP)
PWG 5100.7-2019: IPP Job Extensions v2.0 (JOBEXT)
Table 2 - "media-col" Member Attributes : Ambiguous whether Conformance column is for Clients or Printers

Smith Kennedy Sep 11, 2020

Section 5.3.1 "media-col (collection)" defines the "media-col" Job Template attribute. On page 27 (, Table 2 - "media-col" Member Attributes provides a Conformance column. It is unclear whether the conformance assertions in that table and in the member attribute definition subsections of 5.3.1 are specifying Client or Printer conformance requirements. From consulting with Mike Sweet, it seems that it is by convention a Printer conformance requirement.

It isn't clear from the current or previous definition, but all the members are OPTIONAL - there is no minimum set of member attributes the Client has to supply.