attachment-0001
<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=us-ascii">
<meta name=Generator content="Microsoft Word 12 (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:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@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:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
p.NormalArial, li.NormalArial, div.NormalArial
{mso-style-name:"Normal + Arial\,10 pt";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Arial","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
/* List Definitions */
@list l0
{mso-list-id:1311979778;
mso-list-type:hybrid;
mso-list-template-ids:-1767210124 67698689 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:.75in;
text-indent:-.25in;
font-family:Symbol;}
@list l1
{mso-list-id:1536192047;
mso-list-type:hybrid;
mso-list-template-ids:-1986465694 759046450 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l1:level1
{mso-level-text:"\(%1\)";
mso-level-tab-stop:.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level2
{mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level3
{mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level4
{mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level5
{mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level6
{mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level7
{mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level8
{mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1:level9
{mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Do either of you object if we put this on the PMP/WIMS mailing
list and include it in the face-to-face discussion?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>With respect to Ira’s comments, one may argue that design requirements
5-7<o:p></o:p></span></p>
<p class=NormalArial style='margin-left:.75in;text-align:justify;text-indent:
-.25in;mso-list:l0 level1 lfo3'><![if !supportLists]><span style='font-family:
Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>should support automatic device driver
installation by client and server operating systems (see section 3.2).<o:p></o:p></p>
<p class=NormalArial style='margin-left:.75in;text-align:justify;text-indent:
-.25in;mso-list:l0 level1 lfo3'><![if !supportLists]><span style='font-family:
Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>should support interoperable advertising of
implemented document formats by network spoolers and network Printers (see
sections 3.1 and 3.2).<o:p></o:p></p>
<p class=NormalArial style='margin-left:.75in;text-align:justify;text-indent:
-.25in;mso-list:l0 level1 lfo3'><![if !supportLists]><span style='font-family:
Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>should support interoperable discovery of
available document formats by Imaging Clients and Imaging Servers (see sections
3.1 and 3.2).<o:p></o:p></p>
<p class=NormalArial style='text-align:justify'><span style='font-size:14.0pt;
font-family:"Calibri","sans-serif"'>would suggest a document format method that
did distinguish between variations on a language without the need for creating a
slew of vendor-specific language identifications. <o:p></o:p></span></p>
<p class=NormalArial style='text-align:justify'><span style='font-size:14.0pt;
font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=NormalArial style='text-align:justify'><span style='font-size:14.0pt;
font-family:"Calibri","sans-serif"'>Thanks,<o:p></o:p></span></p>
<p class=NormalArial style='text-align:justify'><span style='font-size:14.0pt;
font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=NormalArial style='text-align:justify'><span style='font-size:14.0pt;
font-family:"Calibri","sans-serif"'>Bill Wagner<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></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:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Ira McDonald
[mailto:blueroofmusic@gmail.com] <br>
<b>Sent:</b> Wednesday, January 27, 2010 3:29 PM<br>
<b>To:</b> William Wagner; wims@pwg.org; Ira McDonald<br>
<b>Cc:</b> Jerry Thrasher<br>
<b>Subject:</b> Re: [PDL versions?] PWG last call - Command Set Format -
IEEE1284 Device ID -25 Feb 2010<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Hi Jerry,<br>
<br>
The short answers to your questions are:<br>
<br>
(1) Distinguishing Emulation from Genuine was not a<br>
design objective.<br>
<br>
(2) Distinguishing PDL versions was also not a design<br>
objective (or plausibly interoperable).<br>
- The use and misuse of the corresponding version<br>
elements in the Printer MIB v1/v2 prtInterpreterTable<br>
is a hopeless mess.<br>
- Nobody was willing to let the editors to address this<br>
when we did Printer MIB v2.<br>
<br>
So, inserting version information may work for a given<br>
vendor, but completely breaks interoperability across<br>
different spoolers and OS environments.<br>
<br>
We could perhaps introduce a syntax for version<br>
suffixes, but the chances that vendors will correctly<br>
implement it seems very unlikely.<br>
<br>
Bearing in mind the machine-readability imperative,<br>
do you have an interoperable version suffix format<br>
to propose? <br>
<br>
Or an interoperable Emulation versus Genuine suffix<br>
format?<br>
<br>
Cheers,<br>
- Ira (1284 Cmd Set editor)<br>
<br clear=all>
Ira McDonald (Musician / Software Architect)<br>
Chair - Linux Foundation Open Printing WG<br>
Co-Chair - TCG Hardcopy WG<br>
IETF Designated Expert - IPP & Printer MIB<br>
Blue Roof Music/High North Inc<br>
email: <a href="mailto:blueroofmusic@gmail.com">blueroofmusic@gmail.com</a><br>
winter:<br>
579 Park Place Saline, MI 48176<br>
734-944-0094<br>
summer:<br>
PO Box 221 Grand Marais, MI 49839<br>
906-494-2434<br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal>On Wed, Jan 27, 2010 at 11:58 AM, William Wagner <<a
href="mailto:wamwagner@comcast.net">wamwagner@comcast.net</a>> wrote:<o:p></o:p></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt;color:#1F497D'>Hi Jerry,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt;color:#1F497D'>I am sending your questions onto Ira. I
think your two points are very good ones. My take on them:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt;color:#1F497D'>The spec allows for </span><span
style='font-size:14.0pt'>PrtInterpreterLangFamilyTC, mime-media-type, and <span
style='color:#1F497D'>Private type designations. </span>PrtInterpreterLangFamilyTC
does not provide for version and emulation variations; mime-types for all of
the variations do not exist, and would be cumbersome if they were to be all
registered; and having applications understand the difference between private
types is unrealistic.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt'>The intent is machine identification of the command
language. Just indicating (by an appropriate means… placing
“emulation” after the designation does not appear consistent
with the spec) that a pdl is an emulation warns the interpreter that
there may be differences from the defined set, but these will likely be
different from one emulation to another. I think the best approach depends on
how good the emulation is (as an emulation, not as a PDL). But, barring having
to define and designate each emulation as a separate PDL, there might be
some benefit in somehow flagging that a PDL might deviate somewhat from the
defined language.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt'>Major Version differences are likely more
drastic, more likely to be independently defined and since there should
be fewer of them that possible emulations, more amenable to being listed as
separate MIB or MIME types. That is, there is little advantage in knowing the
language is up-version (other than expecting differences) unless the
interpreter knows what the differences are. To be able to do this, the version
and its definitive reference should be identified in a standard way. The
problem then, of course, is who is going to register these versions.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt'>Thanks for the input.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt'>Bill Wagner</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:14.0pt;color:#1F497D'> </span><o:p></o:p></p>
<table class=MsoNormalTable border=0 cellpadding=0 width="100%"
style='width:100.0%'>
<tr>
<td width="40%" valign=top style='width:40.1%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:7.5pt'>Jerry Thrasher/Lex/Lexmark</span></b> <o:p></o:p></p>
<p><span style='font-size:7.5pt'>01/27/2010 09:07 AM</span> <o:p></o:p></p>
</td>
<td width="59%" valign=top style='width:59.16%;padding:.75pt .75pt .75pt .75pt'>
<table class=MsoNormalTable border=0 cellpadding=0 width="100%"
style='width:100.0%'>
<tr>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=right style='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:right'><span style='font-size:7.5pt'>To</span><o:p></o:p></p>
</td>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto'><span style='font-size:7.5pt'>"William Wagner" <<a
href="mailto:wamwagner@comcast.net" target="_blank">wamwagner@comcast.net</a>></span>
<o:p></o:p></p>
</td>
</tr>
<tr>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=right style='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:right'><span style='font-size:7.5pt'>cc</span><o:p></o:p></p>
</td>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'></td>
</tr>
<tr>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=right style='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:right'><span style='font-size:7.5pt'>Subject</span><o:p></o:p></p>
</td>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto'><span style='font-size:7.5pt'>Re: [Pwg-Announce] PWG last call -
Command Set Format - IEEE1284 Device ID -25 Feb
2010</span><o:p></o:p></p>
</td>
</tr>
</table>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<table class=MsoNormalTable border=0 cellpadding=0>
<tr>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'></td>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'></td>
</tr>
</table>
</td>
</tr>
</table>
<p><br>
<br>
<span style='font-size:10.0pt'>Bill,</span> <br>
<br>
<span style='font-size:10.0pt'>A couple of questions have come up with respect
to what's really required to be done and what</span> <br>
<span style='font-size:10.0pt'>can be done with respect to two particular
issues.</span> <br>
<span style='font-size:10.0pt'>1. The percieve requirement for not confusing
PDL emulation with "true" PDL support</span> <br>
<span style='font-size:10.0pt'>Example, Postscript Emulation vs. Adobe
PostScript and PCL Emulation vs. HP PCL support.</span> <br>
<span style='font-size:10.0pt'>2. The need for the ability for versioning of
the various PDLs.</span> <br>
<span style='font-size:10.0pt'>PCL 6 is very different from PCL 3 (most low end
inkjet printers still support only PCL 3, the first</span> <br>
<span style='font-size:10.0pt'>PCL to support color).</span> <br>
<br>
<span style='font-size:10.0pt'>So here's what I'm talking about from a real
string.</span> <br>
<span style='font-size:10.0pt'>Example:</span> <br>
<span style='font-size:10.0pt'>If the current CMD string is:</span> <br>
<br>
<span style='font-size:10.0pt'>COMMAND SET:PCL 6 Emulation, PostScript Level 3
Emulation, NPAP, PJL;</span> <br>
<br>
<span style='font-size:10.0pt'>Would a compliant string simply be:</span> <br>
<br>
<span style='font-size:10.0pt'>COMMAND SET:PCL,PS,PCL 6 Emulation, PostScript
Level 3 Emulation, NPAP, PJL;</span> <br>
<span style='font-size:10.0pt'><br>
</span>_____________________________________ <o:p></o:p></p>
<p><img border=0 width=164 height=46 id="_x0000_i1025"
src="cid:image001.gif@01CA9F77.C4ACE430" alt=LEXMARK><span style='font-size:
10.0pt;color:#666666'> <b><br>
Jerry Thrasher</b><br>
Senior Engineer, WW Corporate Standards<br>
C14/082-1, 740 New Circle Rd, Lexington Ky 40550<br>
Office: +1 859 825 4056 Fax: +1 859 232 7628<br>
thrasher(at)lexmark(dot)com</span><o:p></o:p></p>
</div>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<br />--
<br />This message has been scanned for viruses and
<br />dangerous content by
<a href="http://www.mailscanner.info/"><b>MailScanner</b></a>, and is
<br />believed to be clean.
</body>
</html>