From: David Poehlman <poehlman1@comcast.net>

Date: Tue, 26 Nov 2002 17:47:51 -0500

To: wai-ig list <w3c-wai-ig@w3.org>

Message-id: <003a01c2959d$db129f30$19e03244@DAVIDPOEHLMAN>

Date: Tue, 26 Nov 2002 17:47:51 -0500

To: wai-ig list <w3c-wai-ig@w3.org>

Message-id: <003a01c2959d$db129f30$19e03244@DAVIDPOEHLMAN>

----- Original Message ----- From: "Alan Cantor" <Alan.Cantor@MBS.GOV.ON.CA> To: <EASI@MAELSTROM.STJOHNS.EDU> Sent: Tuesday, November 26, 2002 5:21 PM Subject: Re: Making math equations accessible Thank you to everyone who responded with their ideas. The approach we have decided to adopt is to include an alt tag with each equation. The equations themselves are images. The alt tags will follow these basic rules: 1. Write equations linearly. 2. Use different levels of brackets to indicate different nested levels. 3. Use / for divide, * for multiply, ^ for exponent, etc. 4. Use commonsense expressions like sqrt for square root, Sum for sigma, d(x) or dx for differential of x, etc. Therefore, the alt tag for the equation V equals the cube root of x + y squared, all divided by z, would be: V = [ (x + y) ^ (1/3) ] /z Alan Alan Cantor Project Manager Strategic e-Government Implementation e-Government, OCCS 416-212-1152 Alan.Cantor@mbs.gov.on.ca >>> richj@ASU.EDU 11/26/02 04:34pm >>> The question needs some clarification. Do you have specific users that need to have access? Are you looking for a conversion process for math to Braille or audio? Or are you looking for a web based method of presenting math to anyone who clicks on the URL? If it is the later, there are no complete answers. MathML and LaTex offers several possible solutions. Duxbury will convert some LaTex files. BUT there is no standard for writing MathML or LaTex to create an accessible files. A completed conversion process is dependent on money, not ideas. The short answer is that there is not an automatic way to do it. The most usable (quick and dirty) method of presenting symbolic information on the web is to use the same approach that is used with pdf files. Have the symbolic document in whatever, editor or graphic file you want and then include a second accessible format. An audio file of the symbolic information would work. It would be nice if you also had the information in Nemeth Code, but unless you are expecting the users to compute the information, audio would suffice.Received on Tuesday, 26 November 2002 17:48:23 GMT

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