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Re: Formula

From: Elizabeth J. Pyatt <ejp10@psu.edu>
Date: Thu, 27 Jan 2005 08:31:42 -0500
Message-Id: <p06020400be1e9c30d0a1@[]>
To: w3c-wai-ig@w3.org
1) Yes you should provide a text based description for accessibility. 
Since this is a complex formula, you may want to do it as a longdesc 
or provide a link to the text description. The Alt Tag could be just 
be the the name of the formula (e.g. "Saftey Stock Formula - See text 

For the longdesc, the safest option is to spell out each word. For 
instance, don't say "sin(t)" which would probably be read "cint or 
sintee", but "sine of t"

See http://tlt.its.psu.edu/suggestions/accessibility/math.html for 
additional examples.

2) I would avoid MathML in general since it is poorly supported on 
the Mac (sigh). MathML also requires users to have special plug-ins 
and browsers, and I have no idea how a screen reader would handle 

Elizabeth Pyatt

>How do I implement accessibility for mathematical formula without 
>MathML? Do I need to spell out the formula in the alternate text? 
>What is the correct way to create an alternate text of a complex 
>formula, like the following:
>Many thanks,
>Content-Type: image/jpeg;
>	name="image001.jpg"
>Content-ID: <image001.jpg@01C5048D.163614B0>
>Content-Description: image001.jpg
>Content-Location: image001.jpg
>Content-Type: image/jpeg;
>	name="image002.jpg"
>Content-ID: <image002.jpg@01C5048D.163614B0>
>Content-Description: image002.jpg
>Content-Location: image002.jpg

Elizabeth J. Pyatt, Ph.D.
Instructional Designer
Education Technology Services, TLT/ITS
Penn State University
ejp10@psu.edu, (814) 865-0805 or (814) 865-2030 (Main Office)

210 Rider Building II
227 W. Beaver Avenue
State College, PA   16801-4819

(image/jpeg attachment: image001.jpg)

(image/jpeg attachment: image002.jpg)

Received on Thursday, 27 January 2005 13:35:33 UTC

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