I saw that there is a typo in the example from contextgarden.
This one is correct:
\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
\startPDFalternativetext{this is a cow}
\externalfigure[cow]
\stopPDFalternativetext
\stoptext
But again, Acrobat Reader > Document Properties > Tagged PDF > No
Steffen
> Am 06.02.2025 um 13:06 schrieb Steffen Wolfrum <cont...@st.estfiles.de>:
>
> 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....@gmail.com
>> <mailto:florent....@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 <cont...@st.estfiles.de
>> <mailto:cont...@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....@gmail.com
>>> <mailto:florent....@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 <cont...@st.estfiles.de
>>> <mailto:cont...@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/>
>>> > -----------------------------------------------------------------
>>> > ___________________________________________________________________________________
>>> > 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 <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 <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
> ___________________________________________________________________________________
___________________________________________________________________________________
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
___________________________________________________________________________________
