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support for sub and sup in screen readers and talking browsers

From: Christophe Strobbe <christophe.strobbe@esat.kuleuven.be>
Date: Thu, 13 Sep 2007 16:01:08 +0200
Message-Id: <>
To: w3c-wai-ig@w3.org


I recently read in a report on accessibility of mathematics and 
science that screen readers can't tell the difference between sub and 
sup in HTML, so a<sup>n</sup> and a<sub>n</sub> are both rendered the 
same on a Braille display, namely as "an".

I would like to collect some more data on the support of sub and sup 
by screen readers and talking browsers and I have put together a 
small test page for this purpose: <http://tinyurl.com/2qll7h>. The 
page contains five examples of superscript and subscript and a few 
combinations of these.

With Fire Vox, the code samples given above are read as an emphatic 
"an". The output for the other expressions is also misleading. I 
would appreciate it if users of screen readers and talking browsers 
could tell me what their systems output for each of the five 
examples. I will then add the test results to the test page.

Best regards,

Christophe Strobbe
K.U.Leuven - Dept. of Electrical Engineering - SCD
Research Group on Document Architectures
Kasteelpark Arenberg 10 bus 2442
B-3001 Leuven-Heverlee
tel: +32 16 32 85 51

Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
Received on Thursday, 13 September 2007 14:01:31 UTC

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