[NTG-context] Re: images with alt text

[Steffen Wolfrum <context@st.estfiles.de>]

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When running the test with an older (2022.07.06 21:42) LMTX
and opening the PDF with Acrobat Reader, checking the Document Properties “Tagged PDF?” it says “Yes”!

Steffen


> Am 06.02.2025 um 12:56 schrieb Florent Michel <florent.m42@gmail.com>:
> 
> No. I tested it (and added also the backend stuff) ...
> \setupbackend[
> format={pdf/a-1b:2005},
> profile={default_cmyk.icc,default_rgb.icc,default_gray.icc},
> intent=Coated FOGRA39 (ISO 12647-2:2004),
> level=0]
> \setupstructure[state=start,method=auto]
> \setupbackend[export=yes]
> \setupexternalfigures[location=default]
> \starttext
> \pdfalternativetext{\externalfigure[cow]}
>     {alternate description}
> \stopPDFalternativetext
> \stoptext
> … but when opening the PDF with Acrobat Reader and checking the Document Properties “Tagged PDF?” it says “No”.
> (Even though it is recognised as PDF/A)
> 
> Thanks for having tried! I unfortunately know nothing about how Acrobat Readers checks for a tagged PDF, so I'll refrain from trying to propose solutions - which would likely not work. 
> 
> Cheers,
> Florent
> 
> Le jeu. 6 févr. 2025 à 11:23, Steffen Wolfrum <context@st.estfiles.de <mailto:context@st.estfiles.de>> a écrit :
> No. I tested it (and added also the backend stuff) ...
> 
> \setupbackend[
> format={pdf/a-1b:2005},
> profile={default_cmyk.icc,default_rgb.icc,default_gray.icc},
> intent=Coated FOGRA39 (ISO 12647-2:2004),
> level=0]
> \setupstructure[state=start,method=auto]
> \setupbackend[export=yes]
> 
> \setupexternalfigures[location=default]
> \starttext
> \pdfalternativetext{\externalfigure[cow]}
>     {alternate description}
> \stopPDFalternativetext
> \stoptext
> 
> … but when opening the PDF with Acrobat Reader and checking the Document Properties “Tagged PDF?” it says “No”.
> (Even though it is recognised as PDF/A)
> 
> Steffen
> 
> 
>> Am 04.02.2025 um 16:40 schrieb Florent Michel <florent.m42@gmail.com <mailto:florent.m42@gmail.com>>:
>> 
>> Hi, 
>> 
>> It seems that the accessibility page has moved here: https://wiki.contextgarden.net/Input_and_compilation/Accessibility <https://wiki.contextgarden.net/Input_and_compilation/Accessibility> .
>> Maybe the last example is suitable? 
>> 
>> (It seems to correctly embed the alt text in the pdf; this can be checked by using the `--nocompression` flag and opening the resulting pdf with a text editor. Not sure how to have the alt text in the exported html, though; I'm sure others will be able to advise on that better than I could.)
>> 
>> Best,
>> Florent
>> 
>> 
>> Le mar. 4 févr. 2025 à 14:29, Steffen Wolfrum <context@st.estfiles.de <mailto:context@st.estfiles.de>> a écrit :
>> Hi,
>> 
>> today my publishers ask for an example of how ConTeXt deals with accessibility.
>> 
>> I send them a PDF with
>> 
>> \setupbackend[export=yes]
>> \setupstructure[state=start,method=auto]
>> 
>> What they needed was like
>> <img src="example.jpg" alt="Example text">
>> 
>> What is the equivalent for this with ConTeXt?
>> Contextgarden ( https://contextgarden.net/Accessibility <https://contextgarden.net/Accessibility>) is empty...
>> 
>> Yours, Steffen
>> 
>> 
>> 
>> > Am 23.09.2024 um 17:09 schrieb Hans Hagen via ntg-context <ntg-context@ntg.nl <mailto:ntg-context@ntg.nl>>:
>> > 
>> > On 9/23/2024 8:02 AM, Pablo Rodriguez via ntg-context wrote:
>> >> On 9/22/24 21:58, Hans Hagen via ntg-context wrote:
>> >>> On 9/22/2024 2:43 PM, Pablo Rodriguez via ntg-context wrote:
>> >>> 
>> >>>> It would be great to have synonyms added the /E information by default.
>> >>>> I think this may be a requirement for text-to-speech conversions.
>> >>> 
>> >>> even more crap .. let's wait till abbreviations are completely forbiddeb
>> >>> (and also units and such )
>> >> From what I see, /E may be helpful (similar to /ActualText).
>> > 
>> > Imo it's useless:
>> > 
>> > (1) normally when a new abbreviation is intriduced one has the expanded meaning after it
>> > (2) after that it is suposed to be known
>> > (3) if one jumps into a document in the middle one cannot expect it to be repeated every time
>> > (4) if that *is* expoected there is no need to use abbreviations at all
>> > (5) so, why should a 'read out' document have all abbreviations with an expanded meaning and a typeset text not
>> > 
>> >> For me, the real problem with accessibility (and penalties for
>> >> non-accessible documents) is that it will force all documents to be
>> >> machine-readable (so we have to feed AI with all our public documents,
>> >> whether we like it or not).
>> > 
>> > i assume that such a machine learning or pattern recognotion app can quite well figure out that it's an abbreviation
>> > 
>> >> I mean, no such as "\enabledirectives[backend.pdf.nounicode=❌]" allowed.
>> > 
>> > well, everything is allowed ... after all why do we typeset and visualize otherwise ... it depends on the audience
>> > 
>> > one can always generate multiple versions, one with two times the number of pages and all expanded
>> > 
>> > Hans
>> > 
>> > 
>> > 
>> > -----------------------------------------------------------------
>> >                                         Hans Hagen | PRAGMA ADE
>> >             Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>> >      tel: 038 477 53 69 | www.pragma-ade.nl <http://www.pragma-ade.nl/> | www.pragma-pod.nl <http://www.pragma-pod.nl/>
>> > -----------------------------------------------------------------
>> > ___________________________________________________________________________________
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>> > 
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>> > webpage  : https://www.pragma-ade.nl <https://www.pragma-ade.nl/> / https://context.aanhet.net <https://context.aanhet.net/> (mirror)
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>> > ___________________________________________________________________________________
>> 
>> ___________________________________________________________________________________
>> If your question is of interest to others as well, please add an entry to the Wiki!
>> 
>> maillist : ntg-context@ntg.nl <mailto:ntg-context@ntg.nl> / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl <https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl>
>> webpage  : https://www.pragma-ade.nl <https://www.pragma-ade.nl/> / https://context.aanhet.net <https://context.aanhet.net/> (mirror)
>> archive  : https://github.com/contextgarden/context <https://github.com/contextgarden/context>
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>> ___________________________________________________________________________________
>> ___________________________________________________________________________________
>> If your question is of interest to others as well, please add an entry to the Wiki!
>> 
>> maillist : ntg-context@ntg.nl <mailto:ntg-context@ntg.nl> / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl <https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl>
>> webpage  : https://www.pragma-ade.nl <https://www.pragma-ade.nl/> / https://context.aanhet.net <https://context.aanhet.net/> (mirror)
>> archive  : https://github.com/contextgarden/context <https://github.com/contextgarden/context>
>> wiki     : https://wiki.contextgarden.net <https://wiki.contextgarden.net/>
>> ___________________________________________________________________________________
> 
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl <mailto:ntg-context@ntg.nl> / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl <https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl>
> webpage  : https://www.pragma-ade.nl <https://www.pragma-ade.nl/> / https://context.aanhet.net <https://context.aanhet.net/> (mirror)
> archive  : https://github.com/contextgarden/context <https://github.com/contextgarden/context>
> wiki     : https://wiki.contextgarden.net <https://wiki.contextgarden.net/>
> ___________________________________________________________________________________
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki     : https://wiki.contextgarden.net
> ___________________________________________________________________________________


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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________