attachment
<div dir="ltr"><div><div><div><div><div><div><div><div>Hi Smith,<br><br></div>We've never made "pdl-override-supported" have 'guaranteed' as REQUIRED<br></div>(even in IPP/2.1 or IPP/2.2 levels), because it's binary. <br>
<br>If you claim that your Printer supports 'guaranteed' then you have to be able to<br>*successfully* intercept and override everything in your interpreters (vanishingly <br>unlikely in PDF, for example).<br></div>
</div><br></div>I agree with Mike that I've never seen a printer in the wild that actually supported<br></div>'guaranteed'.<br><br></div><div>I also agree that should make 'attempted' a REQUIRED value and 'guaranteed'<br>
</div><div>a RECOMMENDED value (explaining in the Implementors Guide that there are<br></div><div>practical limitations w/ third-party interpreters to perfect override).<br><br></div><div>Cheers,<br></div><div>- Ira<br><br>
</div><div><br><br><br></div>Cheers,<br></div>- Ira<br><br></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr">Ira McDonald (Musician / Software Architect)<br>Co-Chair - TCG Trusted Mobility Solutions WG<br>
Chair - Linux Foundation Open Printing WG<br>Secretary - IEEE-ISTO Printer Working Group<br>Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG<br>IETF Designated Expert - IPP & Printer MIB<br>Blue Roof Music / High North Inc<br>
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</div><div style="display:inline"></div><div style="display:inline"></div><div></div><div></div><div></div><div></div></div></div>
<br><br><div class="gmail_quote">On Wed, May 21, 2014 at 11:22 AM, Kennedy, Smith (Wireless Architect) <span dir="ltr"><<a href="mailto:smith.kennedy@hp.com" target="_blank">smith.kennedy@hp.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Mike,<br>
<br>
Since “attempted” is so squishy, why not mandate “guaranteed”? Including “attempted” seems like a loophole.<br>
<br>
Smith<br>
<br>
/**<br>
Smith Kennedy<br>
ATB Wireless Architect - PPS<br>
Hewlett-Packard Co.<br>
*/<br>
<div><div class="h5"><br>
<br>
<br>
On 2014-05-21, at 7:42 AM, Michael Sweet <<a href="mailto:msweet@apple.com">msweet@apple.com</a>> wrote:<br>
<br>
> All,<br>
><br>
> 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.<br>
><br>
> 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.<br>
><br>
> My recommendation is for us to add the following conformance statement in a future revision of the IPP Everywhere specification:<br>
><br>
> pdl-override-supported (type2 keyword)<br>
><br>
> When reporting capabilities for the 'application/pdf', 'image/jpeg', or 'image/pwg-raster'<br>
> MIME media types, Printers MUST report either 'attempted' or 'guaranteed' for the<br>
> "pdl-override-supported" Printer attribute,<br>
><br>
> Thoughts?<br>
><br>
> _________________________________________________________<br>
> Michael Sweet, Senior Printing System Engineer, PWG Chair<br>
><br>
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