We've never made "pdl-override-supported" have 'guaranteed' as REQUIRED
(even in IPP/2.1 or IPP/2.2 levels), because it's binary.
If you claim that your Printer supports 'guaranteed' then you have to be
*successfully* intercept and override everything in your interpreters
unlikely in PDF, for example).
I agree with Mike that I've never seen a printer in the wild that actually
I also agree that should make 'attempted' a REQUIRED value and 'guaranteed'
a RECOMMENDED value (explaining in the Implementors Guide that there are
practical limitations w/ third-party interpreters to perfect override).
Ira McDonald (Musician / Software Architect)
Co-Chair - TCG Trusted Mobility Solutions WG
Chair - Linux Foundation Open Printing WG
Secretary - IEEE-ISTO Printer Working Group
Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG
IETF Designated Expert - IPP & Printer MIB
Blue Roof Music / High North Inc
mailto: blueroofmusic at gmail.com
Winter 579 Park Place Saline, MI 48176 734-944-0094
Summer PO Box 221 Grand Marais, MI 49839 906-494-2434
On Wed, May 21, 2014 at 11:22 AM, Kennedy, Smith (Wireless Architect) <
smith.kennedy at hp.com> wrote:
> Hi Mike,
>> Since “attempted” is so squishy, why not mandate “guaranteed”? Including
> “attempted” seems like a loophole.
> Smith Kennedy
> ATB Wireless Architect - PPS
> Hewlett-Packard Co.
>>>> On 2014-05-21, at 7:42 AM, Michael Sweet <msweet at apple.com> wrote:
>> > All,
> > It has come to my attention that neither the IPP Everywhere nor the PWG
> Raster Format specs explicitly call out required values for the
> "pdl-override-supported" Printer attribute. This attribute specifies
> whether the Printer can override embedded job ticket information (such as
> media size) when requested in a Job via the "ipp-attribute-fidelity" or
> "job-mandatory-attributes" Job Template attributes.
> > Generally speaking, Printers SHOULD support PDL override for the
> standard PDLs in IPP Everywhere, including PWG Raster, JPEG, and PDF.
> Typically this means forcing prints to a single media/size or forcing
> simplex/duplex output, and is particularly important for JPEG.
> > My recommendation is for us to add the following conformance statement
> in a future revision of the IPP Everywhere specification:
> > pdl-override-supported (type2 keyword)
> > When reporting capabilities for the 'application/pdf', 'image/jpeg',
> or 'image/pwg-raster'
> > MIME media types, Printers MUST report either 'attempted' or
> 'guaranteed' for the
> > "pdl-override-supported" Printer attribute,
> > Thoughts?
> > _________________________________________________________
> > Michael Sweet, Senior Printing System Engineer, PWG Chair
> > _______________________________________________
> > ipp mailing list
> > ipp at pwg.org> > https://www.pwg.org/mailman/listinfo/ipp>>> _______________________________________________
> ipp mailing list
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