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** Accessible documents**

I use the term *accessible* here in the way
W3C Accessibility
Initiative understands it. (see also,
Section 508 software accessibility standards and
http://www.section508.gov)
While LaTeX provides a powerful
desktop publishing tool for creating scientific documents,
Mathematical Markup Language (MathML) facilitates the use of mathematical
and scientific content on the Web. And TeX4ht is a tool for converting
LaTeX input into hypertext document, including MathML. There is
elegance and efficiency when the same LaTeX (ASCII) source file can
produce different outputs; dvi, postscript, and pdf for
printing/viewing, or XML/MathML for accessible viewing in browsers.
MathML is an
application of XML for
describing mathematical notations, and capturing both their structure and
content. It aims at integrating mathematical notation into World Wide
Web documents so they can be accessible to the visually impaired.
As LaTeX, XML is a markup language for representing structured
documents. However, in contrast to LaTeX, XML is **NOT** page
layout language. Also, XML is an interchange and manipulation
interface designed for machine, and not to be edited by humans.

Firefox (at least 2.0 and up) and Opera (at least 9.52 and up) browsers
properly render MathML content on all three platforms (Linux/Mac/Windows).
For best rendering installation of additional fonts is suggested.

For proper rendering of MathML, Internet Explorer (version 5.5 and up)
browser requires additional plugin from *Design Science* website.

As far as know, Safari browser does not properly render MathML.

For details of adjusting/testing your Firefox, Opera, or Internet Explorer browsers
for MathML content, read section 7 of my tutorial:

viewing accessible documents with math content.

Installation of *Fire Vox* (screen and math reader) for Firefox browser
described in section 7.2 is optional.