attachment
<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Yu Mincho";
panose-1:2 2 4 0 0 0 0 0 0 0;}
@font-face
{font-family:"\@Yu Mincho";}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">Could the failure be due to 'none (unsupported)' being in the unsupported-attributes group, when it should be 'requested-attributes'?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img width="668" height="213" style="width:6.9583in;height:2.2187in" id="Picture_x0020_1" src="cid:image001.png@01D66C8C.B1EED950"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Christopher Rizzo<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Xerox Corporation<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">GDG/Discovery/Advance Technology<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">26600 SW Parkway Ave.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Wilsonville, OR 97070-9251<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Phone: (585) 314-6936<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Email: Christopher.Rizzo@xerox.com<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">"The realization came over me with full force that a good part of the remainder of my life was going to be spent in finding errors in my own programs."<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">-Maurice Wilkes, <i>
Memoirs of a Computer Pioneer</i></span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Christopher Rizzo <Christopher.Rizzo@xerox.com><br>
<b>Date: </b>Friday, August 7, 2020 at 7:25 AM<br>
<b>To: </b>Michael Sweet <msweet@msweet.org><br>
<b>Cc: </b>PWG Workgroup <ipp@pwg.org><br>
<b>Subject: </b>Re: [IPP] IPP Everywhere v1.1 ipp-tests.sh test I-10.3 Get-Printer-Attributes with requested-attributes = 'none'<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">Mike,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">So our device is returning 'successful-ok-ignored-or-substituted-attributes', and not 'successful-ok', since 'none' is not an attribute that it supports.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Why is this a failure?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Chris<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Christopher Rizzo</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Xerox Corporation</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">GDG/Discovery/Advance Technology</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">26600 SW Parkway Ave.</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Wilsonville, OR 97070-9251</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Phone: (585) 314-6936</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Email: Christopher.Rizzo@xerox.com</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">"The realization came over me with full force that a good part of the remainder of my life was going to be spent in finding errors in my own programs."</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">-Maurice Wilkes, <i>
Memoirs of a Computer Pioneer</i></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Michael Sweet <msweet@msweet.org><br>
<b>Date: </b>Friday, August 7, 2020 at 6:43 AM<br>
<b>To: </b>Christopher Rizzo <Christopher.Rizzo@xerox.com><br>
<b>Cc: </b>PWG Workgroup <ipp@pwg.org><br>
<b>Subject: </b>Re: [IPP] IPP Everywhere v1.1 ipp-tests.sh test I-10.3 Get-Printer-Attributes with requested-attributes = 'none'</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Chris,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #B5C4DF 4.5pt;padding:0in 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt" id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<p class="MsoNormal">On Aug 6, 2020, at 8:12 PM, Rizzo, Christopher via ipp <<a href="mailto:ipp@pwg.org">ipp@pwg.org</a>> wrote:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Trying to find in what IPP spec a requested-attributes value of 'none' is documented.<o:p></o:p></p>
</div>
</blockquote>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Sadly, it is not explicitly documented.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">However, as it is not one of the registered group names, 'none' literally represents an attribute named 'none', since it is quite likely that nobody will have implemented an attribute named 'none'. :)<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #B5C4DF 4.5pt;padding:0in 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt" id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<p class="MsoNormal">Also wondering what is the purpose of a Get-Printer-Attributes request whose requested-attributes value = 'none'?<o:p></o:p></p>
</div>
</blockquote>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">The point is more to ensure that an implementation actually supports attribute filtering using the "requested-attributes" operation attribute. Too many printers incorrectly support it, particularly in respect to the registered attribute
group names, and this has caused years of interoperability issues as CUPS and other clients have tried to implement driverless printing.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">________________________<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Michael Sweet<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
</div>
</body>
</html>