[NTG-context] Accessibility and Tagged PDF/A, Footnotes showing

Alan BRASLAU alan.braslau at cea.fr
Mon Jan 18 23:07:37 CET 2016

On Mon, 18 Jan 2016 22:38:56 +0100
Hans Hagen <pragma at wxs.nl> wrote:

> On 1/18/2016 8:26 PM, Ursula Hermann wrote:
> > Hello Hans and Dr. Dominik Klein!
> >
> > Today I found a Thread about Accessibility from last Juli!
> >
> >
> > I work at the University in Vienna,  and I work with students, who
> > are blind or have a see handicap. So I read this Thread today.
> >
> > Last year in Summer I began to read the manual of Context.
> >
> > I have a question to this discussion, it is nessesary to know: How
> > can footnotes be shown in the PDF/A tagged PDF, in a text?
> >
> > What I mean something, that shows in the Text the text from the
> > footnote, when I click on the number from the footnote.
> >
> >
> > Maybe with a tooltip? Or what is the right way? Which command?  
> tooltips are widgets and not part of the document text stream .. so i 
> think they don't count as accessibility feature (but i might be wrong)
> maybe someone else on the list knows
> i wonder, as you use tex you can consider generating an additional 
> document (larger fontsize, better readable fonts, inline notes, maybe 
> other enhancements), pop ups etc
> it'a anyway interesting to discuss how to make documents accessible 
> (tagged pdf is one options but not beforehand the nicest approach)


It is an interesting comment going beyond the simple (yet important)
question of accessibility: how in general should items such as
footnotes be handled in alternative, non-printed formats, where the
notion of a "page" becomes fuzzy?

With ConTeXt, it is easy to have such "footnotes" placed at the bottom
of the formatted page, at the end of a section, chapter or book. It is
also easy for them to have hyperlinks to jump to their location and
then back to the reference text.

Tooltips and other widgets, as Hans says, depend on the display client
and not on the document - there are many things that might work with
one reader (i.e. Adobe) and not on others. Addressing the questions of
accessibility, in particular for blind or otherwise vision-impaired
readers, one can design an appropriate action or model for the
document. Footnotes and endnotes are useful tools for a writer. Like
indexes, bibliographic references, or floating figures or tables, these
are concepts that might require some thought as to how they might be
employed in an ebook or by an audio reader. This would make an
interesting topic of discussion for our next ConTeXt users' meeting.


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