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From: Kemp Watson <kemp@objectivepathology.com>
To: Larry Gritz <lg@larrygritz.com>, "tiff@lists.maptools.org"
	<tiff@lists.maptools.org>
Thread-Topic: [Tiff] Libtiff will be released soon
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	<C2D0C070-4F5F-4475-A4BC-E02312985968@larrygritz.com>
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Subject: Re: [Tiff] Libtiff will be released soon
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I=92ve sent emails to Adobe support, no responses, several times over the l=
ast year.

Leonard Rosenthol, here on the list, is with Adobe on the PDF team, and has=
 asked internally as it=92s not his wheelhouse.

I=92ve asked Dave Urbanic at Zoomify to try via his buddy Pete Falco at Ado=
be, nothing came of that.

Really, if Adobe=92s not going to maintain TIFF, they should give up owners=
hip of the standard, or at least admit they want it to die=85 heck, they do=
n=92t even host a copy of the standard any more. The standard says the stan=
dard is published at

https://www.adobe.com/Support/TechNotes.html

and

ftp://ftp.adobe.com/pub/adobe/DeveloperSupport/TechNotes/PDFfiles

Both are 404/gone.

Interestingly, I just read the spec again; here=92s the part about tag regi=
stration:

An organization might wish to store information meaningful to only that org=
ani-
zation in a TIFF file. Tags numbered 32768 or higher, sometimes called priv=
ate
tags, are reserved for that purpose.
Upon request, the TIFF administrator (send email to devsup-person@adobe.com=
)
will allocate and register one or more private tags for an organization, to=
 avoid
possible conflicts with other organizations. You do not need to tell the TI=
FF ad-
ministrator what you plan to use them for, but giving us this information m=
ay help
other developers to avoid some duplication of effort. We will likely make t=
he tag
database public at some point.
Private enumerated values can be accommodated in a similar fashion. For ex-
ample, you may wish to experiment with a new compression scheme within TIFF=
.
Enumeration constants numbered 32768 or higher are reserved for private usa=
ge.
Upon request, the administrator will allocate and register one or more enum=
erated
values for a particular field (Compression, in our example), to avoid possi=
ble
conflicts.
Tags and values allocated in the private number range are not prohibited fr=
om
being included in a future revision of this specification. Several such ins=
tances
exist in the current TIFF specification.
Do not choose your own tag numbers. Doing so could cause serious compatibil=
ity
problems in the future. However, if there is little or no chance that your =
TIFF files
will escape your private environment, please consider using TIFF tags in th=
e
=93reusable=94 65000-65535 range. You do not need to contact Adobe when usi=
ng
numbers in this range.

That=92s not how the registries worked in practice, but I personally have n=
ever emailed devsup-person@adobe.com.

Kemp


From: "tiff-bounces@lists.maptools.org" <tiff-bounces@lists.maptools.org> o=
n behalf of Larry Gritz <lg@larrygritz.com>
Date: Saturday, November 10, 2018 at 1:16 PM
To: "tiff@lists.maptools.org" <tiff@lists.maptools.org>
Subject: Re: [Tiff] Libtiff will be released soon

I know there's a good chance that all the right things have been done, but =
can somebody please summarize the history of attempted communications with =
Adobe on the matter of the tag registry -- specifically which people have b=
een contacted and what the replies have been?

I have a few ideas for how to make progress on this but I don't want to mak=
e any assumptions that they haven't been tried before.

--
Larry Gritz
lg@larrygritz.com<mailto:lg@larrygritz.com> / lg@imageworks.com<mailto:lg@i=
mageworks.com>





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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">I=92ve sent emails to A=
dobe support, no responses, several times over the last year.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">Leonard Rosenthol, here=
 on the list, is with Adobe on the PDF team, and has asked internally as it=
=92s not his wheelhouse.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">I=92ve asked Dave Urban=
ic at Zoomify to try via his buddy Pete Falco at Adobe, nothing came of tha=
t.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">Really, if Adobe=92s no=
t going to maintain TIFF, they should give up ownership of the standard, or=
 at least admit they want it to die=85 heck, they don=92t
 even host a copy of the standard any more. The standard says the standard =
is published at<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span lang=3D"EN-US" styl=
e=3D"font-size:12.0pt;font-family:&quot;Core Sans N 35 Light&quot;,sans-ser=
if"><a href=3D"https://www.adobe.com/Support/TechNotes.html">https://www.ad=
obe.com/Support/TechNotes.html</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">and
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span lang=3D"EN-US" styl=
e=3D"font-size:12.0pt;font-family:&quot;Core Sans N 35 Light&quot;,sans-ser=
if"><a href=3D"ftp://ftp.adobe.com/pub/adobe/DeveloperSupport/TechNotes/PDF=
files">ftp://ftp.adobe.com/pub/adobe/DeveloperSupport/TechNotes/PDFfiles</a=
><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">Both are 404/gone.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">Interestingly, I just r=
ead the spec again; here=92s the part about tag registration:<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">An organization might=
 wish to store information meaningful to only that organi-<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">zation in a TIFF file=
. Tags numbered 32768 or higher, sometimes called private<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">tags, are reserved fo=
r that purpose.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">Upon request, the TIF=
F administrator (send email to devsup-person@adobe.com)<o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">will allocate and reg=
ister one or more private tags for an organization, to avoid<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">possible conflicts wi=
th other organizations. You do not need to tell the TIFF ad-<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">ministrator what you =
plan to use them for, but giving us this information may help<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">other developers to a=
void some duplication of effort. We will likely make the tag<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">database public at so=
me point.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">Private enumerated va=
lues can be accommodated in a similar fashion. For ex-<o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">ample, you may wish t=
o experiment with a new compression scheme within TIFF.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">Enumeration constants=
 numbered 32768 or higher are reserved for private usage.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">Upon request, the adm=
inistrator will allocate and register one or more enumerated<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">values for a particul=
ar field (Compression, in our example), to avoid possible<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">conflicts.<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">Tags and values alloc=
ated in the private number range are not prohibited from<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">being included in a f=
uture revision of this specification. Several such instances<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif">exist in the current =
TIFF specification.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><b><span style=3D"font-si=
ze:11.5pt;font-family:&quot;Times New Roman&quot;,serif;color:red">Do not c=
hoose your own tag numbers.</span></b><span style=3D"font-size:11.5pt;font-=
family:&quot;Times New Roman&quot;,serif;color:red"> Doing so
 could cause serious compatibility<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif;color:red">problems in=
 the future. However, if there is little or no chance that your TIFF files<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif;color:red">will escape=
 your private environment, please consider using TIFF tags in the<o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif;color:red">=93reusable=
=94 65000-65535 range. You do not need to contact Adobe when using<o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
11.5pt;font-family:&quot;Times New Roman&quot;,serif;color:red">numbers in =
this range.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">That=92s not how the re=
gistries worked in practice, but I personally have never emailed devsup-per=
son@adobe.com.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif">Kemp<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-=
family:&quot;Core Sans N 35 Light&quot;,sans-serif"><o:p>&nbsp;</o:p></span=
></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:12.0pt;color:black">From=
: </span></b><span style=3D"font-size:12.0pt;color:black">&quot;tiff-bounce=
s@lists.maptools.org&quot; &lt;tiff-bounces@lists.maptools.org&gt; on behal=
f of Larry Gritz &lt;lg@larrygritz.com&gt;<br>
<b>Date: </b>Saturday, November 10, 2018 at 1:16 PM<br>
<b>To: </b>&quot;tiff@lists.maptools.org&quot; &lt;tiff@lists.maptools.org&=
gt;<br>
<b>Subject: </b>Re: [Tiff] Libtiff will be released soon<o:p></o:p></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<p class=3D"MsoNormal">I know there's a good chance that all the right thin=
gs have been done, but can somebody please summarize the history of attempt=
ed communications with Adobe on the matter of the tag registry -- specifica=
lly which people have been contacted
 and what the replies have been? <o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">I have a few ideas for how to make progress on this =
but I don't want to make any assumptions that they haven't been tried befor=
e.<o:p></o:p></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Helvetic=
a;color:black">--<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Helvetic=
a;color:black">Larry Gritz<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Helvetic=
a;color:black"><a href=3D"mailto:lg@larrygritz.com">lg@larrygritz.com</a> /
<a href=3D"mailto:lg@imageworks.com">lg@imageworks.com</a><o:p></o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Helvetic=
a;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
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