Re: Guideline 1.2

Hi Frank,

in fact you mean checkpoint 1.2 of Web Content Accesibility Guidelines -
there are three and a bit sets of accessibility guidelines, so it is helpful
to be so annoyingly precise.

Screen readers and other non-graphic systems do not know what is under each
pixel of a server-side image map. So it is not clear what the link is to. In
fact the specification suggests that they always send a coordinate of 0,0 to
the server - specifically precluding the possibility of using the links
available.

This is different from a client-side image map, where the specification
provides for alternative text content for each active region. There is a
seperate requirement at a lower priority that redundant versions of these are
also available, due to poor implementation in some browsers.

And yes, this does mean a completely redundant set - repeating the links.

cheers

Charles McCN

On Tue, 9 Jan 2001, Frank Gaine wrote:


  Hi All,

  I'm new to this interest group and I don't know if you've covered the
  following at sometime in the past but here goes anyway. I would like to ask
  a question in relation to Guideline 1.2 - it sets out that redundant text
  links should be provided for each active region of a server-side image map.
  What specific difficulties do server-side image maps present for screen
  readers and text only browsers? Does 'redundant text links' mean completely
  seperate (duplicate in fact) hypertext links?

  Thank You
  Frank

  --------------------------------------------
  Frontend ~ Usability Engineering & Interface Design
  http://www.frontend.com

  40 Westland Row
  Dublin 2
  Republic of Ireland
  tel: +353 1 2411 600
  fax: +353 1 2411 601

  16 Mountford House
  25 Britton Street
  London EC1M 5NY
  Tel: +44 207 6082971
  Fax: +44 797 4151362
  --------------------------------------------


-- 
Charles McCathieNevile    mailto:charles@w3.org    phone: +61 (0) 409 134 136
W3C Web Accessibility Initiative                      http://www.w3.org/WAI
Location: I-cubed, 110 Victoria Street, Carlton VIC 3053, Australia
until 6 January 2001 at:
W3C INRIA, 2004 Route des Lucioles, BP 93, 06902 Sophia Antipolis Cedex, France

Received on Tuesday, 9 January 2001 13:46:52 UTC