Adobe Acrobat accessibility criteria
Hello ConTeXt friends, I am newly exploring ConTeXt in search of a better way to produce PDF/UA-1 accessible and PDF/A compliant documents programmatically. From my early experiments, ConTeXt docs appear to fully satisfy the veraPDF validator, but Adobe Acrobat’s Accessibility Checker has three qualms with ConTeXt-produced documents: 1. The document is configured to display the file name rather than the title in the top of the window (DisplayDocTitle == True is what I think is required). See here https://www.w3.org/TR/WCAG20-TECHS/PDF18.html. 2. "Tagged Annotations" fails, suggesting that the document’s links are not properly tagged. I believe the issue is missing "Link - OBJR” (object reference) tags. See here https://amp.levelaccess.net/public/standards/view_best_practice.php?violatio..., here https://www.w3.org/TR/WCAG20-TECHS/PDF11.html, and here http://verapdf.org. 3. "Tab Order" fails, I believe because ConTeXt does not specify that the tab order should follow the Document Structure, so Acrobat reads it as unspecified. See here https://www.w3.org/TR/WCAG20-TECHS/PDF3.html. Is there something I could be doing to correct these issues in my ConTeXt documents? Or is this a change that would have to be made within ConTeXt itself? I know that Adobe is not the definitive arbiter of what an “accessible” PDF looks like, but for many organizations, passing the Acrobat accessibility checker is a prerequisite, so it seems worthwhile to me to make ConTeXt capable of it. Many thanks! Connor Jackson
On 7/27/2021 3:11 AM, Connor P. Jackson via ntg-context wrote:
Hello ConTeXt friends,
I am newly exploring ConTeXt in search of a better way to produce PDF/UA-1 accessible and PDF/A compliant documents programmatically. From my early experiments, ConTeXt docs appear to fully satisfy the veraPDF validator, but Adobe Acrobat’s Accessibility Checker has three qualms with ConTeXt-produced documents:
1. The document is configured to display the file name rather than the title in the top of the window (DisplayDocTitle == True is what I think is required). See here https://www.w3.org/TR/WCAG20-TECHS/PDF18.html.
Does this work at your end? \setupinteraction [title=MyTitle,state=start] \setupinteractionscreen [option={title}] \starttext test \stoptext
2. "Tagged Annotations" fails, suggesting that the document’s links are not properly tagged. I believe the issue is missing "Link - OBJR” (object reference) tags. See here https://amp.levelaccess.net/public/standards/view_best_practice.php?violatio..., here https://www.w3.org/TR/WCAG20-TECHS/PDF11.html, and here http://verapdf.org. 3. "Tab Order" fails, I believe because ConTeXt does not specify that the tab order should follow the Document Structure, so Acrobat reads it as unspecified. See here https://www.w3.org/TR/WCAG20-TECHS/PDF3.html.
Is there something I could be doing to correct these issues in my ConTeXt documents? Or is this a change that would have to be made within ConTeXt itself? I know that Adobe is not the definitive arbiter of what an “accessible” PDF looks like, but for many organizations, passing the Acrobat accessibility checker is a prerequisite, so it seems worthwhile to me to make ConTeXt capable of it. Most fo this is rather trivial but we need examples (mwe) and expected result (in only have an old acrobat x pro and the latest reader, so maybe i can't check all the latest greatest fancy features).
Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------
My prior message got stuck in Moderation Limbo because I attached a PDF, so
resending without the attachments:
Apologies, I realized about an hour after I hit send that I should have
submitted an MRE! Here is an MRE adapted from the wiki page on PDF/A
https://wiki.contextgarden.net/PDF/A:
---
\setupinteraction[title=MyTitle,state=start]
\setupinteractionscreen[option={title}]
\setupbackend[
format={pdf/a-1a:2005},
profile={default_cmyk.icc,default_rgb.icc,default_gray.icc},
intent=ISO coated v2 300\letterpercent\space (ECI)]
%% Tagged PDF
%% method=auto ==> default tags by Adobe
\setupbackend[export=yes]
\setupstructure[state=start,method=auto]
\starttext
\chapter[chap:testing]{Testing}
Here is some text
\useURL[url1][https://xkcd.org][][Here is a link to xkcd]\from[url1]
\stoptext
---
Including \setupinteractionscreen[option={title}] fixed the title issue
(#1)! Thanks for that. I will add that to my default template.
And to see #s 2 and 3, I can send a PDF where I have fixed those errors in
Adobe Acrobat—adding a link-OBJR tag and setting the Tab Order. Is there a
preferred method since the listserv doesn’t seem to like large attachments?
Thanks!
Connor
On Jul 27, 2021 at 12:35:28 AM, Hans Hagen
On 7/27/2021 3:11 AM, Connor P. Jackson via ntg-context wrote:
Hello ConTeXt friends,
I am newly exploring ConTeXt in search of a better way to produce
PDF/UA-1 accessible and PDF/A compliant documents programmatically. From
my early experiments, ConTeXt docs appear to fully satisfy the veraPDF
validator, but Adobe Acrobat’s Accessibility Checker has three qualms
with ConTeXt-produced documents:
1. The document is configured to display the file name rather than the
title in the top of the window (DisplayDocTitle == True is what I
think is required). See here
https://www.w3.org/TR/WCAG20-TECHS/PDF18.html.
Does this work at your end?
\setupinteraction [title=MyTitle,state=start]
\setupinteractionscreen [option={title}]
\starttext test \stoptext
2. "Tagged Annotations" fails, suggesting that the document’s links are
not properly tagged. I believe the issue is missing "Link - OBJR”
(object reference) tags. See here
< https://amp.levelaccess.net/public/standards/view_best_practice.php?violatio...
,
here https://www.w3.org/TR/WCAG20-TECHS/PDF11.html, and here
3. "Tab Order" fails, I believe because ConTeXt does not specify that
the tab order should follow the Document Structure, so Acrobat reads
it as unspecified. See here
https://www.w3.org/TR/WCAG20-TECHS/PDF3.html.
Is there something I could be doing to correct these issues in my
ConTeXt documents? Or is this a change that would have to be made within
ConTeXt itself? I know that Adobe is not the definitive arbiter of what
an “accessible” PDF looks like, but for many organizations, passing the
Acrobat accessibility checker is a prerequisite, so it seems worthwhile
to me to make ConTeXt capable of it.
Most fo this is rather trivial but we need examples (mwe) and expected result (in only have an old acrobat x pro and the latest reader, so maybe i can't check all the latest greatest fancy features).
Hans
----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------
On 7/28/2021 5:05 AM, Connor P. Jackson wrote:
My prior message got stuck in Moderation Limbo because I attached a PDF, so resending without the attachments:
Apologies, I realized about an hour after I hit send that I should have submitted an MRE! Here is an MRE adapted from the wiki page on PDF/A https://wiki.contextgarden.net/PDF/A:
---
\setupinteraction[title=MyTitle,state=start]
\setupinteractionscreen[option={title}]
\setupbackend[
format={pdf/a-1a:2005},
profile={default_cmyk.icc,default_rgb.icc,default_gray.icc},
intent=ISO coated v2 300\letterpercent\space (ECI)]
%% Tagged PDF
%% method=auto ==> default tags by Adobe
\setupbackend[export=yes]
\setupstructure[state=start,method=auto]
\starttext
\chapter[chap:testing]{Testing}
Here is some text
\useURL[url1][https://xkcd.org][][Here https://xkcd.org][][Here is a link to xkcd]\from[url1]
\stoptext
---
Including \setupinteractionscreen[option={title}] fixed the title issue (#1)! Thanks for that. I will add that to my default template.
And to see #s 2 and 3, I can send a PDF where I have fixed those errors in Adobe Acrobat—adding a link-OBJR tag and setting the Tab Order. Is there a preferred method since the listserv doesn’t seem to like large attachments? your file is large because you also embed a profile .. this is more minimal
\setuptagging[state=start] \setupstructure[state=start,method=auto] \starttext \chapter[chap:testing]{Testing} Here is some text \useURL[url1][https://xkcd.org][][Here is a link to xkcd]\from[url1] \goto{next page}[page(2)] \page test \stoptext anyway, adding this - yet another weird - tag related object is doable but i'll send you some files to test off list (the tagging code is already somewhat old but lucky me it's not that complex so i could figure it out without official pdf spec) (when it works ok i also need to backport to mkiv) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------
participants (2)
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Connor P. Jackson -
Hans Hagen