[texhax] making pdf document accessible using LaTeX
William Adams
will.adams at frycomm.com
Mon Nov 12 16:52:03 CET 2007
On Nov 12, 2007, at 9:41 AM, Martin Heller wrote:
> You could provide an alternative text in pdf as well. I don't
> know if screen readers can pick it up, though.
>
> \documentclass[12pt]{article}
> \usepackage[latin1]{inputenc}
> \usepackage[T1]{fontenc}
>
> \begin{document}
> The Pythagorean Theorem is
> \pdfliteral direct {%
> /Span << /ActualText (a\ squared\ plus b\ squared\ equals\ c\
> squared) >> BDC
> }%
> $a^2+b^2=c^2$
> \pdfliteral direct {%
> EMC
> }
> \end{document}
I just tried that in Mac OS X 10.4 (still trying to find the time to
install Leopard) and it works properly w/ Adobe Acrobat 8.
It does create some strange text selection-highlighting issues (you
can't highlight ^2 + b^2 = c^2 in the .pdf), but when you copy and
paste the above typeset sample document you get:
The Pythagorean Theorem is a squared plus b squared equals c squared
1
(which argues that the page number should have ``Page number''
prefixed to it as actual text)
Do you mind if I forward your post to the bookpeople mailing list? It
automatically disguises e-mail addresses so it won't result in more
spam.
Neat! Thanks!
William
--
William Adams
senior graphic designer
Fry Communications
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