RE: Proposed SC on notification of dynamic changes to apage

Hello,

Is “immediately” intended to be a reference to time, location within the reading order or both?

I initially read it as a location reference but I have seen situations where the change follows the control that triggers it in the reading order; however the change does not occur instantaneously causing the user to miss it. I’ve tried to detail an example below of that situation.

The user selects the Yes radio button and a query is launched to get populate data for the fields following the radio button. The user then tabs past those fields while they are being built without realizing s/he missed something.

Thank you,

Rachael

From: David MacDonald [mailto:david@can-adapt.com]
Sent: Tuesday, June 21, 2016 5:17 PM
To: ALAN SMITH <alands289@gmail.com>
Cc: WCAG <w3c-wai-gl@w3.org>
Subject: Re: Proposed SC on notification of dynamic changes to apage

Thanks Alan

I've provided an update based on discussions with another member.

SC x.x.x.x Change of content: Programmatic notification is provided for each change in content that indicates an action was taken or that conveys information, unless one or more of the following is true: (Level AA)

1) The change immediately follows the control that triggered it, in the programmatic reading order.
2) There is an accessibility supported programmatic relationship between the new content and the user activated control that triggers it.
3) The primary purpose of the web page is to provide real time updates and there are more than [x] updates a minute.

Note: The 3rd exception needs a bit of work, to get the balance between a site that is bombarding a user with updates vs. helpfully notifying them. Perhaps frequency threshold for the real time update exception could be determined in consultation with a number of blind users.

https://www.w3.org/WAI/GL/mobile-a11y-tf/wiki/Proposed_SC_on_information_added_or_removed_from_a_page




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David MacDonald



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On Tue, Jun 21, 2016 at 1:08 PM, ALAN SMITH <alands289@gmail.com<mailto:alands289@gmail.com>> wrote:
David,

This is perfect.

Thank you.

Alan

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From: David MacDonald<mailto:david@can-adapt.com>
Sent: Tuesday, June 21, 2016 12:49 PM
To: ALAN SMITH<mailto:alands289@gmail.com>
Cc: WCAG<mailto:w3c-wai-gl@w3.org>
Subject: Re: Proposed SC on notification of dynamic changes to apage

Hi Allan

If text of the page changed above the control there would have to be notification of that change under this SC. So if they changed the rates or something like that on the page when someone answers "yes" to smoking, notification would have to be made.

For your second question. I've proposed an interim definition .... and changed the wording based on Jason's question.

It now reads:


SC x.x.x.x Change of content: Programmatic notification is provided for changes in content that convey information, or indicate an action was taken, unless the changes immediately follow the control that triggered the change in the programmatic reading order. (Level AA)

Definitions:
•       Programmatic notification: Notification by software from data provided in a user-agent-supported manner such that the user agents can extract and present this notification to users in different modalities, without further action by the user, beyond focusing on, or activating the control which caused the change.
•       Change of content: Changes made to a web page after it has been delivered to the user agent.
•       Programmatic Reading Order: The order that a reading device such as a screen reader would parse the content. Usually, this is the same order as the code, and is represented as an accessibility tree. (note: this is an interim definition, that needs further tweaks)



Cheers,
David MacDonald



CanAdapt Solutions Inc.
Tel:  613.235.4902<tel:613.235.4902>

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On Tue, Jun 21, 2016 at 12:36 PM, ALAN SMITH <alands289@gmail.com<mailto:alands289@gmail.com>> wrote:
David,

Two things:


1)      Should we also consider “changes in context which could be additional content that would change the context of the already understand or programically available information?”

Changes in content can change context as noted in the various supporting documents for WCAG 2.0 3.2.2 On Input.

I see radio buttons that display further questions on health websites that not only display new questions but these questions themselves put the original question in a new context.

Do you smoke? Yes/no. No would not change the context but yes would because it will change the entire premise of the questions and end result of the survey and result of the questions due to changes in health rates, and other items. The previous questions would have been in the context of just personal information, but this question introduces a change in context as it would be indicating changes in coverage or rates, etc.


2)      Can you also please add a definition of the final part of this SC?


“if the changes do not immediately follow the control that triggered the change. (Level AA)”

Thank you.

Alan

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From: David MacDonald<mailto:david@can-adapt.com>
Sent: Tuesday, June 21, 2016 12:12 PM
To: WCAG<mailto:w3c-wai-gl@w3.org>
Subject: Proposed SC on notification of dynamic changes to apage

Here's a proposed wording for the dynamic content Success Criterion on dynamic content


=====

SC x.x.x.x Change of content: Programmatic notification is provided for changes in content that convey information, or indicate an action was taken, if the changes do not immediately follow the control that triggered the change. (Level AA)

=====

Definitions

Programmatic notification: Notification by software from data provided in a user-agent-supported manner such that the user agents can extract and present this notification to users in different modalities, without further action by the user, beyond focusing on, or activating the control which caused the change.

Change of content: Changes made to a web page after it has been delivered to the user agent.
https://www.w3.org/WAI/GL/mobile-a11y-tf/wiki/Proposed_SC_on_information_added_or_removed_from_a_page


It is linked from the WIKI of proposed SCs
https://www.w3.org/WAI/GL/wiki/WCAG_2.1


Cheers,
David MacDonald



CanAdapt Solutions Inc.
Tel:  613.235.4902<tel:613.235.4902>

LinkedIn
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twitter.com/davidmacd<http://twitter.com/davidmacd>

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