[pdftex] experiment with tagged PDF

[The Thanh Han]

thanks for the encouragement and the relevant info.
Producing tagged pdf requires heavy changes of macro
packages, so I don't believe it is possible to have a
generic solution at the engine level. I hope to provide the
must-have low-level support and some example how to change eg a
simple latex class file to support tagged pdf.


Thanh


On Mon, Apr 28, 2008 at 10:25:37AM -0700, Neil Soiffer wrote:
> As a member of AIIM's PDF/UA (Universal
> Accessibility)<http://www.aiim.org/standards.asp?ID=27861>working
> group, I'm really happy to see someone has taken an interest in
> creating tagged PDF -- tagging is really important for those that need to
> use assistive technology to access PDF documents.
> 
> For the math part, make sure you tag the math as "formula".  Ideally, you
> should tag each subexpression with the appropriate MathML element name (eg,
> "mfrac" for fractions), but at the very least, add a "tex" attribute to
> "formula" and include the TeX string.  You could also add an "alt" attribute
> to "formula" that contains the TeX, but as "alt" is meant to be human
> readable, it is questionable whether TeX is really appropriate there.
> 
> FYI:  PDF has been turned over to ISO by Adobe and is ISO 32000-1.  It has
> been approved as an ISO spec, but not yet published.  PDF/UA is hoping to
> submit their proposal to ISO for consideration at the fall meeting.
> Approval under ISO takes 2-3 years from the time of first submission, so it
> will be awhile before PDF/UA sees the light of day.  All of the requirements
> of PDF/UA are legal under PDF 1.7 and ISO 32000-1, so tagging the math as I
> suggest above (or any other PDF/UA recommendation) does not need to wait for
> formal ISO approval.
> 
> I hope your "experiment" is successful -- pdftex should produce PDF that is
> accessible by all.
> 
>     Neil
> 
> 
> On Sun, Apr 27, 2008 at 3:44 AM, The Thanh Han <hanthethanh at gmail.com>
> wrote:
> 
> > [for those who are not on the ntg-pdftex dev list]
> >
> > there is a patch to experiment with tagged pdf:
> >
> > http://sarovar.org/tracker/index.php?func=detail&aid=945&group_id=106&atid=495
> >
> >
> > Thanh
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> >