2.3.x Discover navigation and activation keystrokes (former 2.5.1): The user can discover direct navigation and activation keystrokes both programmatically and via perceivable labels. (Level A)

[SC is for reference only - no change]

proposed Intent

This success criterion reduces the cognitive load for keyboard interface users. Navigation by keyboard interface may vary by platform, user agent and assistive technology. Taken as a whole, this creates hardship for keyboard interface users. The user of the keyboard interface needs perceivable labels to learn and be able to operate navigation effectively.

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2.7.2 Persistent Accessibility Settings: User agent accessibility preference settings persist between sessions. (Level A)

[SC is for reference only - no change]

proposed

Lynn has moderately low vision, and sets the default zoom level, font size, and colors to make pages easier for her to read. Because those settings are persistent, she doesn't have to manually restore her settings every time she starts the browser.

Brian has to adjust some settings in his browser to make it fully compatible with his speech input system. It's difficult for him to get it set up, since he can't fully operate the browser until it's done, so once it's configured this way he relies on it staying in that configuration even if he upgrades the browser, restarts his system and so forth.

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2.7.3 Restore all to default: The user can restore all preference settings to default values. (Level A)

[SC is for reference only - no change]

proposed

Ron accidentally changes a browser setting that makes his browser incompatible with his screen reader, preventing him from changing it back. He instead restarts his browser using a command line option that starts it in the default configuration, which he's able to use, and from there he can change the setting that caused him problems.

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2.7.4 Multiple Sets of Preference Settings: The user can save and retrieve multiple sets of user agent preference settings. (Level AA)

[SC is for reference only - no change]

proposed

When Hiroki is carrying his tablet computer he operates it with the built-in touchscreen, but when at his desk he links it to a Bluetooth keyboard and mouse, and redirects the display to a full-size computer monitor. The browser allows him to quickly switch between two completely different configurations for these different environments.

Davy has moderately low vision and prefers to adjust the contrast of media differently during the day than at night. Because this requires a number of different steps, for different types of media and aspects of the browser's display, he has two user profiles, one for each environment.

Aaron usually uses a keyboard and mouse, but when his repetitive strain injury is bothering him he prefers to use the mouse and avoid using the keyboard as much as possible. At those times he users his browser's user preference profiles to load a different configuration that’s optimized for the mouse, including custom toolbars that make most of the commands he uses available as toolbar buttons.

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proposed

The user can avoid potential seizures with a default browser configuration that does not flash more than three times a second above a luminescence or color threshold (2.10.1), or does not flash at all (2.10.2).

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proposed

The user can control background images (2.11.1); render and control placeholders for time-based media and executable content (2.11.2, 2.11.3, 2.11.4); adjust playback (2.11.5), stop/pause/resume (2.11.6), navigate, (2.11.7) and specify tracks for prerecorded time-based media (2.11.9); scale and position alternative media tracks (2.11.11); and adjust contrast and brightness of visual time-based media (2.11.12).

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2.11.7 Navigate Time-Based Media: The user can navigate along the timebase using a continuous scale, and by relative time units within rendered audio and animations (including video and animated images) that last three or more seconds at their default playback rate. (Level A)

[SC is for reference only - no change]

proposed

Jared has a print disability which makes it laborious to read text. He is watching a technical training video which will display section objectives or summary questions as text. When the text flashes by too quickly for him to read, he presses a key command to skip back an increment so he can read the text, or pause the video if more time is required.

Debbie has difficulty with bright or flashing video. When she encounters a flashing transition in a video, she quickly presses a key command to forward the video past the flashing, then carefully uses the slider to adjust the video back to the start of the next section avoiding the flashing material.

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2.11.8 Semantic Navigation of Time-Based Media: The user can navigate by semantic structure within the time-based media, such as by chapters or scenes present in the media (Level AA).

[SC is for reference only - no change]

proposed

Marka is blind and is listening to a video of an hour-long lecture. The section she is in has some complex material that builds on material from an earlier section. While a sighted user could pause the video and move the slider back until she recognized visually distinct content from the section she wanted, Marka uses a control to skip back section by section until she hears the section title name she wants to review. When she is finished, Marka uses the control to move forward section by section until she hears the title of topic she was originally in.

Wes has repetitive stress injury where repetition reduces the amount of screen time he has per day. Wes stops playback of a training video when he is tired and after resting, he can navigate to the scene where he left off.

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2.11.9 Track Enable/Disable of Time-Based Media: During time-based media playback, the user can determine which tracks are available and select or deselect tracks. These selections may override global default settings for captions, audio descriptions, etc. (Level AA)

[SC is for reference only - no change]

proposed

Marka is listening to a video of a lecture. The professor is demonstrating a chemistry experiment and is not speaking during a key part. Since she cannot see what the professor is demonstrating, Marka brings up a menu of the available tracks and discovers that there is a audio description track available. Marka selects the description track, rewinds a few minutes, and listens to the description of the experiment.

Gorges is deaf, and enjoys current run movies. He subscribes to a web service that streams major popular movies. While he speaks English, a certain movie uses a slang that he doesn't understand. He pauses the movie, selects a menu of caption tracks and finds a Spanish caption track. He then watches the rest of the movie with Spanish captioning.

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2.11.11 Scale and position visual alternative media tracks: The user can scale and position alternative media tracks independent of base video. (Level AAA)

[SC is for reference only - no change]

proposed

Justin has low vision and works in a noisy environment that makes it difficult to listen to instructional videos. When he enlarges the text of the captions to a viewable size, they block most of the video image. Justin selects an option that displays the caption track in a separate window, which he positions below the video image so they captions do not block the video image.

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2.11.12 Video Contrast and Brightness: Users can adjust the contrast and brightness of visual time-based media. (Level AAA)

[SC is for reference only - no change]

proposed

Frank has low vision that requires a higher contrast to discern a video image. When Frank is watching an instructional video, he selects a menu that allows him to increase the contrast of the video, to make it easier for him to see the important content.

Kelly has photo-epilepsy and is watching an amateur video taken on a sunny day near the water. Concerned that the video may contain flashing that could trigger a seizure, Kelly selects a menu of video controls that allow her to reduce the brightness and contrast of the video. While some of the detail is lost, Kelly can safely watch the video.

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3.3.3 Changes Between Versions: Changes to features that meet UAAG 2.0 success criteria since the previous user agent release are documented. (Level AA)

[previous SC is for reference only - no change]

proposed

Martha goes to an app store on her computer and notices that an update for the web browser she uses is available. She installs it and finds a welcome page talking about the new features in this release when she launches the updated version of the browser. One of the links on that page says "What's new For Accessibility". following this link Martha reads about the accessibility improvements added and discovers this update had added a feature allowing her to have tooltips displayed for elements when she is using caret browsing. the text says, "In this version, we added the ability to display tooltips on elements with a title attribute when using the keyboard. With caret browsing turned on simply arrow onto an element with a title and the tooltip will remain visible while the caret is within the element." The text also informs Martha that this feature is off by default and that she should go to accessibility settings to turn it on.

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3.3.4 Centralized View: There is a dedicated section of the documentation that presents a view of all features of the user agent necessary to meet the requirements of User Agent Accessibility Guidelines 2.0. (Level AAA)

[previous SC is for reference only - no change]

proposed

Bob downloads a new web browser on his mobile phone. He's never used this software before and also uses a screen reader that is part of his phone's operating system. He opens a help option for the web browser and finds an accessibility section that gives details on the various accessibility features of the browser such as screen layout, interaction with his screen reader and a list of supported touch gestures.

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proposed to REMOVE:

5.1.1 Follow Accessibility Guidelines: Non-web-based user agent user interfaces follow user interface accessibility guidelines for the platform. (Level A)

this SC is a duplicate of 5.3.2

Summary

Details

5.3.2 Implement Accessibility Features of platform: Implement and cite in the conformance claim the accessibility features of content and platform technology specifications. Accessibility features are those that are either (Level A) :
* identified as such in the specification or
* allow authors to satisfy a requirement of WCAG.

[SC is for reference only - no change]

proposed

The operating system on which a user agent is running has expected conventions around accessibility for areas such as keyboard behavior, support of an accessibility API, user interface design, and other standards related to accessibility. The intent of this success criteria is to ensure that user agents comply with the basic accessibility requirements of the platform in use.

Summary

(1 response didn't contain an answer to this question)

Details

5.3.1 Implement accessibility features of content specs: Implement and cite in the conformance claim the accessibility features of content specifications. Accessibility features are those that are either (Level A)
• identified as such in the specification or
• allow authors to satisfy a requirement of WCAG.

[SC is for reference only - no change]

proposed Intent

Accessibility features are included in content specs to provide features required by users with various disabilities. If those features are not fully supported by the user agent, users can't easily take advantage of those features. The user should be able to easily discover detailed information about the user agent’s adherence to accessibility standards, including those related to content such as HTML and WAI-ARIA, and should be able to do so without installing and testing the accessibility features. This will allow them to make informed decisions about whether or not to they will be able to use, and therefore should install, a new product or version of that product.

proposed Example

Jordy uses a web site which uses WAI-ARIA to identify the functions of custom controls. If he were to use a web browser that didn't support this aspect of WAI-ARIA and expose that information to assistive technology, the web site would be unusable with his web browser. Therefore Jordy needs to choose a web browser that he knows fully supports WAI-ARIA, and he determines this by reading product documentation and UAAG conformance claims posted on the Web.

Summary

(1 response didn't contain an answer to this question)

Details