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Re: [techs] The TH Rule

From: Sailesh Panchang <sailesh.panchang@deque.com>
Date: Mon, 10 May 2004 16:57:38 -0400
Message-ID: <024701c436d1$6de4c330$a401a8c0@deque.local>
To: "Chris Ridpath" <chris.ridpath@utoronto.ca>, "Carlos A Velasco" <Carlos.Velasco@fit.fraunhofer.de>
Cc: "WAI WCAG List" <w3c-wai-gl@w3.org>
Hello All,
Chris wrote:
>adding TH elements to the table can help make the >navigation easier. This is
>the reason behind the TH rule. It's not required as part of >the HTML spec
>but can be required by accessibility guidelines. I believe >that this simple rule can make a large difference in >creating more accessible tables.

Well I'll say  make table caption  too necessary for data tables. They will certainly  help make a distinction and be very useful for accessibility and enhance usability.
Captions make sense for  data tables and I have yet to see one used on a layout table like table summaries are.
Again,  when tables are nested, only the  nested table can be a data table. The  outer table must always be regarded as a layout table.

Chris, by the way, JAWS and HPR handle scope  for simple tables but WinEyes4.5  does not handle scope at all. HTML specs also say use scope on simple tables only. JAWS reads first row cells and left column cells as col and row headers regardless of markup (th or td) Thois is JAWS 4.51 to 5.0.
Sailesh Panchang
Senior Accessibility Engineer 
Deque Systems,11180  Sunrise Valley Drive, 
4th Floor, Reston VA 20191
Tel: 703-225-0380 Extension 105 
E-mail: sailesh.panchang@deque.com
Fax: 703-225-0387
* Look up <http://www.deque.com> *
Received on Monday, 10 May 2004 16:45:32 GMT

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