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Proposed accessible name and description calculations for TABLE markup

From: Jon Gunderson <jongund@illinois.edu>
Date: Thu, 7 Jan 2010 09:10:00 -0600 (CST)
To: "HTML Accessibility Task Force" <public-html-a11y@w3.org>
Cc: "HTML WG Public List" <public-html@w3.org>
Message-Id: <20100107091000.CAT60196@expms1.cites.uiuc.edu>
One of the main questions is the mapping of table related markup to accessibility APIs to ensure the consistent browser and assistive technology behavior that everyone wants and to give developers predictable design practices.  

The markup under discussion includes:

CAPTION element
SUMMARY attribute
ARIA-LABELLEDBY attribute
ARIA-LABEL attribute
ARIA-DESCRIBEDBY attribute

The primary accessibility API mappings of concern are:

1. Accessible Name
2. Accessible Description

Suggested order of Accessible NAME calculation:

CAPTION element content 
ARIA-LABEL attribute value
ARIA-LABELLEDBY attribute calculated value (from list of ID references in ID order)

Suggested order of Accessible DESCRIPTION calculation:

Summary attribute value
ARIA-DESCRIBEDBY attribute calculated value (from list of ID references in ID oreder)


This algorithm provides both inline and reference means to provide accessible names and descriptions for tables, is compatible with previous accessibility techniques and the new aria techniques.


Jon Gunderson, Ph.D.
Coordinator Information Technology Accessibility
Disability Resources and Educational Services

Rehabilitation Education Center
Room 86
1207 S. Oak Street
Champaign, Illinois 61820

Voice: (217) 244-5870

WWW: http://www.cita.illinois.edu/
WWW: https://netfiles.uiuc.edu/jongund/www/

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Received on Thursday, 7 January 2010 15:10:33 GMT

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