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Re: [a11y-metadata-project] accessHazard

From: Andy Heath <andyheath@axelrod.plus.com>
Date: Wed, 02 Oct 2013 00:11:40 +0100
Message-ID: <524B56AC.2060901@axelrod.plus.com>
To: Emmanuelle Gutiérrez y Restrepo <emmanuelle@sidar.org>
CC: 'Madeleine Rothberg' <madeleine_rothberg@wgbh.org>, a11y-metadata-project@googlegroups.com, public-vocabs@w3.org
Emmanuelle,

You are perfectly correct.
The definition we gave the term flashing in AfA 3.0 was

"A resource whose visual pattern flashes more than three times in any 
one second; this level of flashing can cause seizures in some users 
(WCAG2 Guideline 2.3.2):

     http://www.w3.org/TR/WCAG20/#seizure].
"

It isn't sufficient that there is just a term in a vocabulary - it needs 
precise definition somewhere also. I'm not sure what the plans in this 
project are for definitions like this but I would guess its somewhere in 
the development pipeline.

Best

andy
axelafa.com
> Hi all,
>
> I am concerned that the term "flashing" can be misleading or confusing.
> Something that flashes is not bad in itself, everything depends on the
> ratio of flashes per second. At least not for everyone. While something
> that flashes to any ratio can be annoying and even disabling for a
> person with attention deficit is not for everyone. And for something
> that flashes generate a seizure, certain conditions must be met.
>
> I think we need to be more precise.
>
> Perhaps there could be a general indicator for something that flashes
> and another for something that can generate seizures in some people.
>
> /Emmanuelle Gutiérrez y Restrepo/
>
> Patrono y Directora General
>
> Fundación Sidar - Acceso Universal
>
> Email: coordina@sidar.org <mailto:coordina@sidar.org>
>
> Personal: Emmanuelle@sidar.org <mailto:Emmanuelle@sidar.org>
>
> Web: http://sidar.org
>
> *De:*a11y-metadata-project@googlegroups.com
> [mailto:a11y-metadata-project@googlegroups.com] *En nombre de *Madeleine
> Rothberg
> *Enviado el:* miércoles, 02 de octubre de 2013 0:43
> *Para:* a11y-metadata-project@googlegroups.com; public-vocabs@w3.org
> *Asunto:* Re: [a11y-metadata-project] accessHazard
>
> Yes! Even better.
>
> Madeleine
>
>
> On 2013-10-01, at 6:11 PM, "Charles Myers" <charlesm@benetech.org
> <mailto:charlesm@benetech.org>> wrote:
>
>     Charles McN had a great idea when he brought this up.  But it may
>     actually be a bit simpler to specify.
>
>     Rather than sav
>
>       * noFlashing
>       * noMotionSimulation
>       * noSound
>
>     in addition to the three properties we have today
>
>       * flashing
>       * motionSimulation
>       * sound
>
>     we might just want to have a state of "none" (saying that you
>     checked and that there are no hazards that you are aware of).
>
>     That would change the spec to
>
>       * flashing
>       * motionSimulation
>       * sound
>       * none (or noHazard)
>
>     which makes it cleaner.  I think that saying the negative to each of
>     the three properties would be a bit tedious.  And, of course, not
>     having the property means that it has not been checked.
>
>     On Oct 1, 2013, at 1:38 PM, Madeleine Rothberg
>     <madeleine_rothberg@wgbh.org <mailto:madeleine_rothberg@wgbh.org>>
>
>       wrote:
>
>
>
>     Chuck has updated the issues list to include the discussion of whether
>     accessHazard should state positive or negative information. See that
>     post
>     and my comments, which are also below, at:
>     [http://www.w3.org/wiki/WebSchemas/Accessibility/Issues_Tracker#accessHazar
>     d_-_Ok_as_is.2C_or_should_it_be_negated_in_sense.3F]
>
>     I believe we need both accessHazard=flashing and
>     accessHazard=noFlashing,
>     etc.. This is because there are three cases we'd like to distinguish:
>
>     1. checked and it's fine
>     2. checked and it is NOT fine
>     3. didn't check
>
>     "Didn't check" can be signified by no metadata -- this will be most
>     of the
>     content on the Web. In cases where someone has checked, let's record
>     both
>     positive and negative states.
>
>     -Madeleine
>
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andy
andyheath@axelrod.plus.com
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Andy Heath
http://axelafa.com
Received on Tuesday, 1 October 2013 23:12:10 UTC

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