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Mathematics-related checkpoints

From: T. V. Raman <raman@Adobe.COM>
Date: Wed, 20 Jan 1999 13:56:13 -0800 (PST)
Message-ID: <13990.20733.169878.153602@labrador>
To: Jason White <jasonw@ariel.ucs.unimelb.EDU.AU>
Cc: WAI Markup Guidelines <w3c-wai-gl@w3.org>
Make sure that the guidelines are written such that "ascii
representation" of math does not get interpreted as ASCII
art --that would be useless both now and in the future.

>>>>> "Jason" == Jason White <jasonw@ariel.ucs.unimelb.EDU.AU> writes:

    Jason> I have not reviewed the guidelines to establish
    Jason> where these checkpoints would best fit, but the
    Jason> following suggestions come to mind in respect of
    Jason> mathematical content:

    Jason> 1. When browsers provide support for viewing and
    Jason> processing it, use MathML to represent
    Jason> mathematical expressions occurring in a document.

    Jason> 2. Until MathML is supported by browsers, images
    Jason> may be used to represent mathematical content, so
    Jason> long as alternative text providing an ASCII
    Jason> representation of the mathematics is supplied.

    Jason> In the Techniques document, an example could be
    Jason> given of the latter method, adopting the ASCII
    Jason> representation used in Donald E. Knuth's TeX
    Jason> typesetting system. Rationale: an ASCII version
    Jason> can be read by today's assistive
    Jason> technologies. Query whether there are characters
    Jason> in Unicode that could be used in ALT text to
    Jason> represent the mathematical symbols and whether
    Jason> these would provide a better interim solution (I
    Jason> suspect that they would not be supported by
    Jason> current assistive technologies and that we will
    Jason> need to fall back upon straightforward ASCII as
    Jason> mentioned above).

    Jason> The two proposed checkpoints are modeled on the
    Jason> provisions related to style sheets and the legacy
    Jason> problem associated with the use of tables for
    Jason> layout purposes.

Best Regards,

      Adobe Systems                 Tel: 1 408 536 3945   (W14-128)
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      W14-128 345 Park Avenue     Email: raman@adobe.com 
      San Jose , CA 95110 -2704     Email:  raman@cs.cornell.edu
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      http://cs.cornell.edu/home/raman/raman.html    (Cornell)
    Disclaimer: The opinions expressed are my own and in no way should be taken
as representative of my employer, Adobe Systems Inc.
Received on Wednesday, 20 January 1999 16:56:26 UTC

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