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SC 2.1.1 and server-side image maps

From: Christophe Strobbe <christophe.strobbe@esat.kuleuven.be>
Date: Thu, 08 Feb 2007 22:01:11 +0100
Message-Id: <6.2.5.6.2.20070208215438.02d650e0@esat.kuleuven.be>
To: w3c-wai-gl@w3.org

Hi,

During the review of certain WCAG 2.0 test cases in the BenToWeb 
project, we ran into the following issue.
Success criterion 2.1.1 requires: "All functionality of the content 
is operable in a non-time-dependent manner through a keyboard 
interface, except where the task requires analog, time-dependent input."
Appendix D of WCAG 2.0 (Comparison of WCAG 1.0 checkpoints to WCAG 
2.0 - non-normative) maps WCAG 1.0 checkpoint 1.2 to several WCAG 2.0 
success criteria. Checkpoint 1.2 reads: "Provide redundant text links 
for each active region of a server-side image map." With regard to 
keyboard access, the checkpoint is mapped to success criterion 2.1.1, 
but it is not clear whether providing redundant text links is 
sufficient: if "content" (as in "All functionality of the 
content...") is interpreted as confined to the image map itself, 
server-side image maps always fail SC 2.1.1 and an alternative needs 
to be provided to meet SC 4.2.1, but if "content" is interpreted as 
the web page containing the image map, then redundant text links in 
the same web page would meet SC 2.2.1 and it would not be necessary 
to fall back on SC 4.2.1. However, client-side image maps are not 
mentioned in Understanding WCAG 2.0, nor in Techniques for WCAG 2.0.
The June 2005 version of HTML Techniques for WCAG 2.0 contained a 
technique called "Text links for server-side image maps"[1] (for 
success criterion 2.4 L 1 SC 1), but it is not entirely clear if this 
would now be considered as a technique for SC 2.1.1 or for SC 4.2.1.

[1] 
http://www.w3.org/TR/2005/WD-WCAG20-HTML-TECHS-20050630/Overview.html#ssim_textlinks

Best regards,

Christophe


-- 
Christophe Strobbe
K.U.Leuven - Departement of Electrical Engineering - Research Group 
on Document Architectures
Kasteelpark Arenberg 10 - 3001 Leuven-Heverlee - BELGIUM
tel: +32 16 32 85 51
http://www.docarch.be/ 


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Received on Thursday, 8 February 2007 21:01:43 GMT

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