|0x4000||Microsoft||Weihai Chen||Used by Microsoft in Win 2000 (and presumably also in their Win 95 and 98 IPP clients)|
|0x4001-0x400F||Apple Inc.||Michael Sweet||Used in the CUPS implementation of IPP. For details see https://www.cups.org/doc/spec-ipp.html|
|0x4010||Peerless Systems Imaging Products||Kris Henderson|
|0x4027-0x4028||Apple Inc.||Michael Sweet||Used in the CUPS implementation of IPP. For details see https://www.cups.org/doc/spec-ipp.html|
It is highly recommended that the functionality represented by the requested operation code be presented to the PWG for inclusion in an official specification before requesting the allocation of a proprietary operation code.
Send email to the IPP secretary to request one or more operation codes in the vendor space (0x4000 to 0xFFFF). The body of the email should contain the following information:
Contact Name: Contact Email: Company Name: Number of Operation Codes -or- Specific Operation Code: Description: Specification Document URL (optional): Specification Document (optional):