[NTG-context] Re: images with alt text

[Florent Michel <florent.m42@gmail.com>]

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Thanks for the information!

A wild guess (apologies for the noise if if there is an obvious reason why
it can't work!): maybe it's worth trying replacing
    format={pdf/a-1b:2005},
with
    format={pdf/a-1a:2005},
or another supported format? (If I read the logs correctly, the supported
formats are 2 | 2.0 | a1a2005 | a1b2005 | a2a | a2b | a2u | a3a | a3b | a3u
| ua1 | ua2 | x1a2001 | x1a2003 | x32002 | x32003 | x4 | x4p | x5g | x5n |
x5pg .)

Cheers,
Florent


Le jeu. 6 févr. 2025 à 13:19, Steffen Wolfrum <context@st.estfiles.de> a
écrit :

> 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 <context@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.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> 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>:
>>
>> Hi,
>>
>> It seems that the accessibility page has moved here:
>> 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> 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) is empty...
>>>
>>> Yours, Steffen
>>>
>>>
>>>
>>> > Am 23.09.2024 um 17:09 schrieb Hans Hagen via ntg-context <
>>> 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 | 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 /
>>> 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
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>>> archive  : 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 /
>> 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
>>
>> ___________________________________________________________________________________
>>
>
> ___________________________________________________________________________________
> 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
>
> ___________________________________________________________________________________
>
>
>
> ___________________________________________________________________________________
> 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
___________________________________________________________________________________