[NTG-context] Re: images with alt text

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

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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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> 
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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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> ___________________________________________________________________________________


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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
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___________________________________________________________________________________