- From: Jonathan Avila <jon.avila@ssbbartgroup.com>
- Date: Tue, 28 Jun 2016 00:45:44 +0000
- To: public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
- CC: WCAG WG <w3c-wai-gl@w3.org>
[Laura wrote] > In addition, I wonder if the second escape clause should be an exemption. What about a person with low vision who does not use AT? I am reminded of the proposed Section 508 functional requirement "302.2 With Limited Vision This section proposes to revise the functional performance criterion for users with limited vision so that, where a visual mode of operation is provided, one mode of operation that magnifies, one mode that reduces the field of vision, and one mode that allows user control of contrast would be required." The Access Board chose to put a requirement in that says "reduces the field of vision" -- while this is a functional requirement that may only be called into play when something can't be made accessible or a technical standard doesn't exist -- it raises a good point that low vision users must deal with. Whether it's limited field of vision due to a visual condition or because of notification/changes that happen outside of the field or content that must be compared such as table headers and a data cell become more difficult and is something that I believe the LV TF will be looking into. I noticed in the Amazon iOS app when you add something to the cart the cart bounces and becomes bigger to let you know that your item was added. This cart icon is at the top right of the screen. In this case they are providing a visual clue and that visual clue would need to be accessible to screen readers but it would easily be missed by a low vision user. I'm sure there are many different preferences on what the solution might be. Jonathan Jonathan Avila Chief Accessibility Officer SSB BART Group jon.avila@ssbbartgroup.com 703.637.8957 (Office) Visit us online: Website | Twitter | Facebook | Linkedin | Blog Check out our Digital Accessibility Webinars! -----Original Message----- From: Laura Carlson [mailto:laura.lee.carlson@gmail.com] Sent: Monday, June 27, 2016 12:00 PM To: Jim Allan; public-low-vision-a11y-tf; David MacDonald Cc: WCAG WG Subject: Re: Proposed SC on notification of dynamic changes to apage Hi Jim, David, and all, On 6/22/16, Jim Allan <jimallan@tsbvi.edu> wrote: > Though this might have implications for low vision folks. Thoughts? > > Jim One thing that would have implications to people with low vision is if a change occurs outside of a person's "point of regard" [1]. The change needs to be in close proximity. Maybe something such as the following would help. "Change of content: Programmatic notification is provided within the point of regard 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)" Or maybe a separate SC language would be in order: "Change of content: Visual notification is provided near 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)" In addition, I wonder if the second escape clause should be an exemption. What about a person with low vision who does not use AT? Kindest Regards, Laura [1] "3.6 Point of Regard and Proximity The point of regard is the area that the user is viewing...Proximity is the space between items. In user interface generally, proximity is about using space to group related content and separate unrelated content." http://w3c.github.io/low-vision-a11y-tf/requirements.html#point-of-regard-and-proximity > ---------- Forwarded message ---------- > From: David MacDonald <david@can-adapt.com> > Date: Tue, Jun 21, 2016 at 4:16 PM > Subject: Re: Proposed SC on notification of dynamic changes to apage > To: ALAN SMITH <alands289@gmail.com> > Cc: WCAG <w3c-wai-gl@w3.org> > > > 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_informati > on_added_or_removed_from_a_page > > > > Cheers, > David MacDonald > > > > *Can**Adapt* *Solutions Inc.* > Tel: 613.235.4902 > > LinkedIn > <http://www.linkedin.com/in/davidmacdonald100> > > twitter.com/davidmacd > > GitHub <https://github.com/DavidMacDonald> > > www.Can-Adapt.com <http://www.can-adapt.com/> > > > > * Adapting the web to all users* > * Including those with disabilities* > > If you are not the intended recipient, please review our privacy > policy <http://www.davidmacd.com/disclaimer.html> > > On Tue, Jun 21, 2016 at 1:08 PM, ALAN SMITH <alands289@gmail.com> wrote: > >> David, >> >> >> >> This is perfect. >> >> >> >> Thank you. >> >> >> >> Alan >> >> >> >> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for >> Windows 10 >> >> >> >> *From: *David MacDonald <david@can-adapt.com> >> *Sent: *Tuesday, June 21, 2016 12:49 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 >> >> >> >> 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 >> >> >> >> *Can**Adapt* *Solutions Inc.* >> >> Tel: 613.235.4902 >> >> LinkedIn >> <http://www.linkedin.com/in/davidmacdonald100> >> >> twitter.com/davidmacd >> >> GitHub <https://github.com/DavidMacDonald> >> >> www.Can-Adapt.com <http://www.can-adapt.com/> >> >> >> >> * Adapting the web to all users* >> >> * Including those with disabilities* >> >> >> >> If you are not the intended recipient, please review our privacy >> policy <http://www.davidmacd.com/disclaimer.html> >> >> >> >> On Tue, Jun 21, 2016 at 12:36 PM, ALAN SMITH <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 >> >> >> >> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for >> Windows 10 >> >> >> >> *From: *David MacDonald <david@can-adapt.com> >> *Sent: *Tuesday, June 21, 2016 12:12 PM >> *To: *WCAG <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_informat >> ion_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 >> >> >> >> *Can**Adapt* *Solutions Inc.* >> >> Tel: 613.235.4902 >> >> LinkedIn >> <http://www.linkedin.com/in/davidmacdonald100> >> >> twitter.com/davidmacd >> >> GitHub <https://github.com/DavidMacDonald> >> >> www.Can-Adapt.com <http://www.can-adapt.com/> >> >> >> >> * Adapting the web to all users* >> >> * Including those with disabilities* >> >> >> >> If you are not the intended recipient, please review our privacy >> policy <http://www.davidmacd.com/disclaimer.html> >> >> >> >> >> >> >> > > > > > -- > Jim Allan, Accessibility Coordinator > Texas School for the Blind and Visually Impaired > 1100 W. 45th St., Austin, Texas 78756 > voice 512.206.9315 fax: 512.206.9264 http://www.tsbvi.edu/ > "We shape our tools and thereafter our tools shape us." McLuhan, 1964 > -- Laura L. Carlson
Received on Tuesday, 28 June 2016 00:46:18 UTC