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Re: Question about image in the alt attribute


From: Olaf Drümmer
Date: Jul 31, 2014 3:59AM

Hi Steve,

a statement like "For user agents that cannot display images, forms, or applets, this attribute specifies alternate text. " needs to be fixed from my point of view, it needs to become more user centric. As an example just envision an ordinary PDF viewer. It could be used by a low vision person, but that person [heavily using magnification to read the text in it] might find it difficult to take in the overall appearance of an image. A tooltip could be provided (even in text form! but also via text to speech or other means) to make it easier/quicker/feasible for that person to take in the image.

This implies two important aspects:
- the person is using its sight (albeit via magnification)
- on top of that that person is making use of the Alternate text to help with consuming an image

The important thing is that the alternate text is available and can be put to work per the user's needs in a given situation. It hasn't got that much to do with limitations in a user agent.


On 31 Jul 2014, at 11:49, Steve Faulkner < <EMAIL REMOVED> > wrote:

> Hi Olaf
> This doesn't need to be fixed in WCAG or HTML as it is not a constraint
> Refer to example scenarios where alt text may be useful http://www.w3.org/html/wg/drafts/html/master/embedded-content.html#examples-of-scenarios-where-users-benefit-from-text-alternatives-for-images
>> On 31 Jul 2014, at 10:43, Olaf Drümmer < <EMAIL REMOVED> > wrote:
>> This is one of the areas where WCAG needs fixing - accessibility is not about disabilities of user agents.
>> Olaf
>>> On 31 Jul 2014, at 10:30, "Jukka K. Korpela" < <EMAIL REMOVED> > wrote:
>>> 2014-07-31 10:56, Olaf Drümmer wrote:
>>>>> On 31 Jul 2014, at 06:56, "Jukka K. Korpela" < <EMAIL REMOVED> > wrote:
>>>>> That's not what the alt attribute is for. It is to be presented when the image is not displayed. It is ALTernative.
>>>> I think you are misunderstanding something here. It is never about what is presented, it is always about what can be perceived. Furthermore supporting more than one channel (e.g. text to speech plus visual display) in the very same moment can be very useful. All this is not about "either or", it is about options (a minimal set of options, more is always OK), and each user should have mechanisms available to make use of these options in any fashion and combination.
>>> "For user agents that cannot display images, forms, or applets, this attribute specifies alternate text."
>>> http://www.w3.org/TR/html4/struct/objects.html#adef-alt
>>> "alt - Replacement text for use when images are not available"
>>> http://www.w3.org/TR/html5/embedded-content-0.html#attr-img-alt
>>> The alt attribute has a job to do (to act as a replacement for an image). Trying to make it handle other affairs as well, no matter how relevant they might be in some contexts, disturbs it in doing its job.
>>> Yucca
>>> >>> >>> >>
>> >> >> > > >