- From: Kitch Barnicle <barnicle@trace.wisc.edu>
- Date: Tue, 31 Aug 1999 20:52:50 -0500
- To: w3c-wai-ua@w3.org
- Message-id: <3.0.32.19990831205038.00754938@trace.wisc.edu>
Hello everyone, Below is the first draft of the user agent impact matrix. This was a bit more complicated then I first thought, as you will see when you come across my question marks.. This matrix is based on the August 27, 1999 version of the user agent checklist, http://www.w3.org/WAI/UA/WAI-USERAGENT-19990827/full-checklist.html . First of all I'd like to say that I was tempted to say that just about every checkpoint could affect users with any and all disabilities. I am afraid that we might run into trouble trying to single out a particular user group. So despite a bit of a nagging feeling I went ahead and took a stab a creating the impact matrix that appears in text below and in an attached HTML table. I created the table by basically editing the user agent guidelines checklist but my formatting may not be totally correct. I attempted to model this matrix after the content guidelines impact matrix http://www.w3.org/WAI/GL/NOTE-WCAG-impact-matrix-19990810 . After each checkpoint follows a list of those disability groups who I believe would be primarily affected by this checkpoint. Possible choices, taken from the content guidelines matrix, include deaf, hard of heard, blindness, low vision, color deficit, cognitive and learning, and physical. The list of disabilities is followed by a list of input and output technologies that would most likely be affected by the checkpoint. Input technologies include all types of keyboards and voice. I guess I didn't include pointing devices, should I have? Output technologies include visual displays, magnified or small screens, speech, braille and audio. I don't think I listed braille in as many places as I should have listed it. Some of these things are popping into my head as I write this note. If N A appears, it means that I believe that this checkpoint would not affect the input technology used, though device independence is still assumed. For example, checkpoint 5.3 Allow the user to control foreground color, shouldn't have an affect on the input device used, though the user should be able to change the foreground color using any input device. Rather than have a matrix, we may just want to state in paragraph form who these checkpoints will most likely affect and how, especially if we expect someone unfamiliar with users with disabilities to be able to use this document. Kitch In General (Priority 1) Checkpoint: 3.1 Ensure that the user has access to document content, including alternative representations of content. Disability: All; especially blindness, low vision, deafness, hard of hearing, cognitive/learning, Photo sensitive (e.g. descriptions of animations) Input: All Output: All Checkpoint: 3.2 For dependent user agents only. Ensure that the user has access to the content of an element selected by the user. Disability: All; (especially blindness, low vision??) Input: All Output: All Checkpoint: 3.3 For dependent user agents only. Render content according to natural language identification. For unsupported natural languages, notify the user of language changes when configured to do so. Disability: All Input: All Output: All Checkpoint: 4.5 Allow the user to turn on and off rendering of audio captions. Disability: Deafness, Hard of Hearing, cognitive/learning [Low vision, blindness - to avoid interference] Input: NA Output: audio, visual [speech, braille, magnified/ small screen] Checkpoint: 12.1 Provide a version of the product documentation that conforms to the Web Content Accessibility Guidelines. Disability: All Input: All Output: All Checkpoint: 12.2 Ensure that all user agent functionalities that promote accessibility are documented. Disability: All Input: All Output: All User Interface (Priority 1) Checkpoint: 4.6 Allow the user to turn on and off animated or blinking text. Disability: Blindness, low vision, cognitive/learning, photosensitive Input: NA Output: visual, braille, magnified/small screen Checkpoint: 4.7 Allow the user to turn on and off animations and blinking images. Disability: Blindness, Input: NA Output: visual, braille, speech, magnified/small screen Checkpoint: 4.9 Allow the user to turn on and off support for user style sheets. Disability: All Input: NA Output: All Checkpoint: 4.10 Allow the user to turn on and off support for author style sheets. Disability: All Input: NA Output: All Checkpoint: 4.11 Allow the user to turn on and off support for spawned windows. Disability: Blindness, low vision, Input: NA Output: Visual, speech, magnified/small screen Checkpoint: 5.1 Allow the user to control font family. Disability: All; especially low vision Input: NA Output: visual, magnified/small screen Checkpoint: 5.2 Allow the user to control the size of text. Disability: All, especially low vision Input: NA Output: visual, magnified/small screen, speech Checkpoint: 5.3 Allow the user to control foreground color. Disability: Color deficit, low vision, cognitive/learning Input: NA Output: visual, magnified/small screen Checkpoint: 5.4 Allow the user to control background color. Disability: Color deficit, Low vision, cognitive/learning Input: NA Output: visual, magnified/small screen Checkpoint: 5.5 Allow the user to control selection highlighting (e.g., foreground and background color). Disability: Color deficit, Low vision, cognitive/learning Input: NA Output: visual, magnified/small screen , speech Checkpoint: 5.6 Allow the user to control focus highlighting (e.g., foreground and background color). Disability: Color deficit, Low vision, cognitive/learning Input: NA Output: visual, magnified/small screen , speech Checkpoint: 5.14 Allow the user to control speech playback rate. Disability: Blindness, cognitive/learning, hard of hearing Input: NA Output: Speech Checkpoint: 8.1 Allow the user to navigate viewports (including frames). Disability: All Input: All Output: All Checkpoint: 8.2 For user agents that offer a browsing history mechanism, when the user returns to a previous view, restore the point of regard in the viewport. Disability: All Input: NA Output: All Checkpoint: 9.1 Provide a mechanism for highlighting and identifying (through a standard interface where available) the current viewport, selection, and focus. Disability: All; (or visual, magnified/small screen??) Input: NA Output: All (Does highlighting imply visual only interfaces?) Keyboard Support (Priority 1) Checkpoint: 2.1 By default and without additional customization, ensure that all functionalities offered by the user agent are accessible using the keyboard. Disability: Blindness, physical, low vision Input: keyboards, voice Output: NA Checkpoint: 2.2 Provide documentation on default keyboard commands and include with user agent documentation and/or user help system. Disability: All; especially blindness, physical, low vision Input: keyboards, voice Output: NA Checkpoint: 2.3 Provide information to the user about the current keyboard configuration. Disability: All: especially blindness, physical, low vision Input: keyboards, voice Output: NA Device Independence (Priority 1) Checkpoint: 1.1 Ensure that all functionalities offered through the user interface may be operated through standard input device APIs supported by the operating system. Disability: All Input: All Output: NA Checkpoint: 1.2 Ensure that the user can interact with all active elements of a document in a device independent manner. Disability: All Input: All Output: All Checkpoint: 1.3 Ensure that the user can install the user agent software in a device independent manner. Disability: All Input: All Output: All Checkpoint: 1.4 Ensure that the user can configure the user agent in a device independent manner. Disability: All Input: All Output: All Checkpoint: 1.5 Ensure that the user can access user agent documentation in a device independent manner. Disability: All Input: NA Output: All Checkpoint: 1.6 Ensure that all messages to the user (e.g., warnings, errors, etc.) are available through standard output device APIs supported by the operating system. Disability: All Input: All Output: All For Tables (Priority 1) Checkpoint: 8.3 For dependent user agents only. Allow the user to navigate just among table cells of a table (notably left and right within a row and up and down within a column). Disability: Blindness, : low vision, physical?? Input: keyboards, voice Output: speech, braille, magnified/small screen Checkpoint: 9.8 For dependent user agents only. Provide access to header information for a selected table cell. Disability: Blindness, low vision, physical Input: NA?? Output: speech, braille, magnified/small screen For Images, Animations, and Image Maps (Priority 1) Checkpoint: 4.1 Allow the user to turn on and off rendering of images. Disability: Low vision, cognitive/learning, blindness Input: NA Output: Visual, magnified/small screen, speech Checkpoint: 4.2 Allow the user to turn on and off rendering of background images. Disability: Blindness, low vision, cognitive/learning Input: NA Output: Visual, magnified/small screen, speech For Synchronized Multimedia (Priority 1) Checkpoint: 3.4 Provide time-independent access to time-dependent active elements or allow the user to control the timing of changes. Disability: All Input: All Output: All Checkpoint: 3.7 Allow the user to specify that description tracks (e.g., caption, auditory description, video of sign language, etc.) be rendered at the same time as audio and video tracks. Disability: Blindness, low vision, deafness, hard of hearing, cognitive/learning Input: NA Output: visual, magnified/small screen, speech, braille Checkpoint: 3.8 If a technology allows for more than one description track (e.g., caption, auditory description, video of sign language, etc.), allow the user to choose from among the tracks. Disability: Blindness, low vision, deafness, hard of hearing, cognitive/learning (or All?? Input: NA Output: visual, magnified/small screen, speech Checkpoint: 3.9 If a technology allows for more than one audio track, allow the user to choose from among tracks. Disability: All?? Input: NA Output: Audio Checkpoint: 4.3 Allow the user to turn on and off rendering of video. Disability: Blindness, low vision, cognitive/learning Input: NA Output: Visual, magnified/small screen, speech Checkpoint: 4.4 Allow the user to turn on and off rendering of sound. Disability: All Input: NA Output: visual user agent with sound, audio, speech Checkpoint: 5.8 Allow the user to control video frame rates. Disability: Low vision, cognitive/learning, photosensitive Input: NA Output: visual, magnified/small screen Checkpoint: 5.9 Allow the user to control the position of audio captions. Disability: Deafness, Hard of hearing, cognitive learning, low vision Input: NA Output: visual, magnified/small screen Checkpoint: 5.11 Allow the user to control audio playback rate. Disability: All; Blindness, low vision, cognitive learning Input: NA Output: Audio For Events, Applets, and Scripts (Priority 1) Checkpoint: 4.8 Allow the user to turn on and off support for scripts and applets. Disability: All Input: All Output: All Checkpoint: 10.1 Provide information about document and viewport changes (to users and through programming interfaces). Disability: Blindness, low vision?? Input: NA Output: speech, magnified/small screen For Standards and Conventions (Priority 1) Checkpoint: 6.1 Use and provide accessible interfaces to other technologies. Disability: All Input: All Output: All Checkpoint: 6.2 Provide programmatic read and write access to user agent functionalities and user interface controls (including selection and focus) by using operating system and development language accessibility resources and conventions. Disability: All Input: All Output: All Checkpoint: 6.3 Notify dependent user agents of changes to the document and user interface controls (including selection and focus) by using operating system and development language accessibility resources and conventions. Disability: All Input: All Output: All Checkpoint: 6.4 For graphical desktop browsers only. Comply with W3C Document Object Model specifications and export interfaces defined by those specifications. Disability: All Input: All Output: All Checkpoint: 7.1 Implement the accessibility features defined for supported specifications. Disability: All Input: All Output: All In General (Priority 2) Checkpoint: 3.5 When no alternative text representation has been specified, indicate what type of object is present. Disability: Blindness, low vision Input: NA Output: Speech, magnified/small screen Checkpoint: 8.4 Allow the user to navigate just among all active elements in the document. Disability: All Input: All Output: All (or NA??) Checkpoint: 8.5 Allow the user to search for rendered text content, including alternative text content. Disability: All, especially blindness, low vision, cognitive learning Input: NA Output: All, especially speech, magnified/small screen, braille, (audio - closed captions??) Checkpoint: 8.6 Allow the user to navigate the document structure. Disability: Blindness, low vision, phyiscal (cognitive/learning??) Input: keyboards, voice Output: visual, speech, braille, magnified/small screen Checkpoint: 9.4 Describe a selected element's context within a document (e.g., numerical or relative position). Disability: Blindness, low vision Input: keyboard, voice Output: speech, braille, magnified/small screen Checkpoint: 12.3 Describe product features known to promote accessibility in a section of the product documentation. Disability: All Input: NA Output: All User Interface (Priority 2) Checkpoint: 5.15 Allow the user to control speech volume, pitch, gender and other articulation characteristics. Disability: Blindness, low vision, cognitive/learning, Hard of hearing Input: NA Output: Speech Checkpoint: 9.3 For dependent user agents only. Allow the user to view a document outline constructed from its structural elements (e.g., from header and list elements). Disability: Blindness, low vision, (cognitive learning??) Input: NA Output: visual, speech, braille, magnified/small screen Checkpoint: 10.2 Ensure that when the selection or focus changes, it is in the viewport after the change. Disability: All Input: NA Output: Visual, magnified/small screen Checkpoint: 11.1 Allow the user to configure the user agent in named profiles that may be shared (by other users or software). Disability: All Input: All Output: All Keyboard Support (Priority 2) Checkpoint: 2.4 Allow the user to configure the keystrokes used to activate user agent functionalities. Wherever possible, allow single key activation of functions. Disability: Blindness, low vision, physical Input: Keyboards, voice Output: NA Checkpoint: 2.5 Allow the user to turn on and off author-specified keyboard configurations. Disability: Blindness, low vision, physical Input: Keyboards, voice Output: NA Checkpoint: 2.6 Use platform conventions to indicate which keys activate which user agent functionalities. Disability: All Input: Keyboards, voice Output: All (Are there conventions for non-visual user agents???) Checkpoint: 2.7 Avoid default keyboard configurations that interfere with system conventions. Disability: All Input: Keyboards, voice Output: NA For Links (Priority 2) Disability: Functional Limitations Input: Input Output: N/A Checkpoint: 9.5 For a selected link, indicate whether following the link will involve a fee. Disability: All??; especially blindness, low vision, cognitive/learning Input: NA Output: All?? For Frames (Priority 2) Checkpoint: 4.12 Allow the user to turn on and off rendering of frames. Disability: Blindess, low vision, cognitive/learning, (physical?? -efficiency) Input: keyboard, voice Output: magnified/small screen, speech, braille Checkpoint: 5.16 When new windows or user interface components are spawned, allow the user to control window size and position. Disability: Low vision?? Input: NA Output: visual, magnified/small screen Checkpoint: 9.2 For dependent user agents only. Provide the user with information about the number of viewports. Disability: Blindness, low vision Input: NA Output: speech, braille, magnified/small screen For Forms (Priority 2) Checkpoint: 9.10 Provide the user with access to any label explicitly associated with a form control. Disability: Blindness, low vision Input: NA Output: speech, braille, magnified/small screen Checkpoint: 10.6 Prompt the user to confirm any form submission not explicitly initiated by the user. Disability: Blindness, low vision, physical?? Input: All Output: All?? For Images, Animations, and Image Maps (Priority 2) Checkpoint: 5.7 Allow the user to control animation rate. Disability: Low vision, cognitive/learning, photosensitive Input: NA Output: visual, magnified/small display For Synchronized Multimedia (Priority 2) Checkpoint: 5.10 Allow the user to start, stop, pause, and rewind video. Disability: All Input: NA Output: visual Checkpoint: 5.12 When the user agent renders audio natively, allow the user to control the audio volume. Disability: All Input: NA Output: Audio Checkpoint: 5.13 Allow the user to start, stop, pause, and rewind audio. Disability: All Input: NA Output: Audio For Standards and Conventions (Priority 2) Checkpoint: 6.5 For graphical desktop browsers only. Provide programmatic exchange of information in a timely manner. Disability: All Input: All Output: All Checkpoint: 6.6 Follow operating system conventions and accessibility settings. In particular, follow conventions for user interface design, default keyboard configuration, product installation, and documentation. Disability: All Input: All Output: All Checkpoint: 7.2 Support appropriate W3C Recommendations. Disability: All Input: All Output: All Checkpoint: In General (Priority 3) Checkpoint: 3.6 When alternative text has been specified explicitly as empty (i.e., an empty string), render nothing. Disability: Blindness, low vision, cognitive/learning Input: NA Output: All Checkpoint: 8.7 Allow the user to configure structured navigation. Disability: Blindness, low vision, cognitive/learning?? Input: All Output: All Checkpoint: 9.7 Provide a mechanism for highlighting and identifying (through a standard interface where available) active elements of a document. Disability: blindness, low vision, physical Input: NA Output: All Checkpoint: 10.4 When loading a resource (e.g., document, video clip, audio clip, etc.) indicate what portion of the resource has loaded and whether loading has stalled. Disability: All; especially blindness, low vision?? Input: Output: Checkpoint: 10.5 Indicate the relative position of the viewport in a resource (e.g., the percentage of the document that has been viewed, the percentage of an audio clip that has been played, etc.). Disability: All Input: NA Output: All User Interface (Priority 3) Checkpoint: 4.13 Allow the user to turn on and off author-specified page forwards that occur after a time delay and without user intervention. Disability: Blindness, low vision Input: NA Output: All Checkpoint: 4.14 Allow the user to turn on and off automatic page refresh. Disability: Blindness, low vision Input: Output: Checkpoint: 9.11 Maintain consistent user agent behavior and default configurations between software releases. Consistency is less important than accessibility and adoption of system conventions. Disability: All Input: All Output: All Checkpoint: 11.2 Allow the user to configure the graphical arrangement of user interface controls. Disability: Physical, low vision, blindness Input: NA Output: Visual, magnified/small screen Keyboard Support (Priority 3) Checkpoint: 2.8 Provide a default keyboard configuration for frequently performed operations. Disability: All; especially blindness, low vision, physical Input: keyboards, voice Output: NA For Links (Priority 3) Checkpoint: 9.6 For a selected link, provide information to help the user decide whether to follow the link. Disability: All; especially blindness, low vision Input: NA Output: All For Tables (Priority 3) Checkpoint: 9.9 For dependent user agents only. Indicate the row and column dimensions of a selected table. Disability: Blindness, low vision Input: NA Output: speech, braille For Events, Applets, and Scripts(Priority 3) Checkpoint: 10.3 Allow the user to selectively turn on and off notification of common types of document and viewport changes. Disability: Blindness, low vision Input: NA Output: ???
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Received on Tuesday, 31 August 1999 21:58:07 UTC