RE: [html-techs-tf] caption vs alt

PS 

 

Here is what the implementation guide says
<http://rawgithub.com/w3c/html-api-map/master/index.html#figure-and-figcapti
on-elements>
http://rawgithub.com/w3c/html-api-map/master/index.html#figure-and-figcaptio
n-elements 

8.7 figure and figcaption elements 

If the figure element has an
<http://www.w3.org/TR/wai-aria/states_and_properties#aria-label> aria-label
or an  <http://www.w3.org/TR/wai-aria/states_and_properties#aria-labelledby>
aria-labelledby attribute the accessible name is to be calculated using the
algorithm defined in section
<http://www.w3.org/TR/wai-aria/roles#namecalculation> 5.2.7. Accessible Name
Calculation of the  <http://www.w3.org/TR/wai-aria/> WAI-ARIA 1.0
specification. 

figure element accessible name calculation

1.	Use aria-labelledby
2.	Otherwise use aria-label
3.	Otherwise use figcaption subtree
4.	Otherwise use title attribute
5.	If none of the above yield a usable text string there is no
accessible name

figure element accessible description calculation 

1.	Use aria-describedby
2.	Otherwise use the title attribute if it wasn't used as the
accessible name
3.	If none of the above yield a usable text string there is no
accessible description

 

 

 

 

Hi Steve

 

>From what I can tell, JAWS, NVDA, VO have made some sort of implementation,
<http://davidmacd.com/test/figure.html>
http://davidmacd.com/test/figure.html

none of them just ignore it. JAWS & NVDA both read the figcaption text
twice, once when encountering the figure and once when encountering the
text. VO announces a group. If you go past it and come back to it seems to
not say it’s a group. In other words they have all put it on their agenda
and from what I can tell made poor decisions about implement it. I would
certainly like to get other people's opinions on this.

 

Neither of them announce whether there is an image or not inside the figure
element or that it is a figure element. The HTML 5 spec says that any type
of 

‘flow content” can be inside the figure element. So I would think it would
be important to screen reader user to know that it is a graphic and when
they encounter this graphic they would hear the figcaption. 

 

Now I have to admit I'm a little unclear of what to expect if it is
implemented properly. There are three things that can get focus.

- The figure element, 

-the flow content, usually an image

-figcaption.

 

If the figure element gets focus I would expect the accessibility API to
report the figcaption as the accName. What if the flow content gets focus?
If it's an image I would think any alt text or the figcaption would get the
accName if there is no alt text. If the flow content is not an image, one
would expect the user to be able to access it with a screen reader ... So
it's not a simple algorithm.

 

I'm just digging into this element now and so I expect learn more next
couple of days... And will refer to the API mapping guide in the ARIA test
harness to better understand the expect behavior. Right now it seems like a
big mess.

 

Cheers,

David MacDonald

 

CanAdapt Solutions Inc.

Tel:  613.235.4902

 <http://ca.linkedin.com/in/davidmacdonald100>
http://ca.linkedin.com/in/davidmacdonald100

 <http://www.can-adapt.com/> www.Can-Adapt.com

   

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            Including those with disabilities

 

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From: Steve Faulkner [mailto:faulkner.steve@gmail.com] 
Sent: January 14, 2014 6:01 AM
To: David MacDonald
Cc: Detlev Fischer; rcorominas@technosite.es; Joshue O Connor;
w3c-wai-gl@w3.org; kirsten@can-adapt.com
Subject: Re: [html-techs-tf] caption vs alt

 

 

On 14 January 2014 10:55, David MacDonald <david100@sympatico.ca> wrote:

My experience is
that once assistive technologies look at an element or attribute and make a
bad decision about how to execute it the possibility of future accessibility
support is weakened considerably.

 

Hi dave I am unclear how you came to the conclusion about figure/figcaption,
what I think has happened so far is nothing as far as AT is concerned. i.e.
the support is as yet unimplemented and browser acc layer support is still
in its infancy.




--

Regards

SteveF

HTML 5.1 <http://www.w3.org/html/wg/drafts/html/master/>