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Re: H43 and header cell relationships

From: Olaf Drümmer <olaf@druemmer.com>
Date: Wed, 19 Feb 2014 22:46:14 +0100
Cc: Olaf Drümmer <olaf@druemmer.com>
Message-Id: <B5372629-FD16-4E03-86F7-A79F0B63A9E9@druemmer.com>
To: "Tongue, Matt" <Matt.Tongue@nrc-cnrc.gc.ca>, W3C WAI ig <w3c-wai-ig@w3.org>
As far as I can tell, any cell should identify only its direct header cell parents. Nested header cell relationships would then be represented by nested use of the headers attribute. 

Olaf

On 19 Feb 2014, at 22:09, "Tongue, Matt" <Matt.Tongue@nrc-cnrc.gc.ca> wrote:

> When marking up a table with multiple levels of headings, is it mandatory to always put all header cell IDs into the headers attribute of a cell?
> 
> For example, if a data cell has 3 header cells, but the 2nd header cell's headers attribute references the 1st header's ID, would it not suffice for the data cell to just reference header cells 2 and 3, since header cell 2 references header cell 1 (thus creating a relationship already)? Or must every header always be identified for every cell, no matter what?
> 
> Reference: http://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/H43
> 
Received on Wednesday, 19 February 2014 21:46:39 UTC

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