- From: Jan Richards <jan.richards@utoronto.ca>
- Date: Mon, 19 Oct 2009 08:10:30 +0200
- To: Sueann Nichols <ssnichol@us.ibm.com>
- CC: WAI-AUWG List <w3c-wai-au@w3.org>
Hi Sueann, Here are my comments: Sueann Nichols wrote: > *PRINCIPLE A.3: Editing views must be operable* > > *Guideline A.3.1 [For the authoring tool user interface] Enhance > keyboard access to authoring features. [**_Return to Guideline_* > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-20090909/Overview.html%5Clgl-tool-keyboard-access>*]* > > *Rationale:* Some _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > with limited mobility or visual disabilities are not able to use a > mouse, and instead require full keyboard access. > > Current A.3.1.1 > > *A.3.1.1 Keyboard:* All functionality of the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > is operable through a keyboard interface without requiring specific > timings for individual keystrokes, except where the underlying function > requires input that depends on the path of the _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>'s > movement and not just the endpoints. (Level A) > > SN Comment – the “underlying function requires input that depends on the > path of the _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>'s > movement and not just the endpoints” doesn’t seem clear. Is the issue > the need for timing? JR: This text came from WCAG 2.0 SC 2.1.1. I think the "except" clause refers more to "is operable through a keyboard interface" than to "without requiring specific timings for individual keystrokes"...because of this explanation in Understanding WCAG 2.0: "The phrase "except where the underlying function requires input that depends on the path of the user's movement and not just the endpoints" is included to separate those things that cannot reasonably be controlled from a keyboard. Most actions carried out by a pointing device can also be done from the keyboard (for example, clicking, selecting, moving, sizing). However, there is a small class of input that is done with a pointing device that cannot be done from the keyboard in any known fashion without requiring an inordinate number of keystrokes. Free hand drawing, watercolor painting, and flying a helicopter through an obstacle course are all examples of functions that require path dependent input. Drawing straight lines, regular geometric shapes, re-sizing windows and dragging objects to a location (when the path to that location is not relevant) do not require path dependent input. " > Recommend re-wording: > > *A.3.1.1 Keyboard:* All functionality of the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > is operable through a keyboard interface and does not require specific > timings for individual keystrokes. An exception is where the underlying > function requires input that depends on the path of the _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>'s > movement and not just the endpoints, and timing of keystrokes is > required to support the function. (Level A) JR: Given what I said above, how about: "A.3.1.1 Keyboard: All functionality of the authoring tool is operable through a keyboard interface and does not require specific timings for individual keystrokes. An exception to keyboard operability is allowed where the underlying function requires input that depends on the path of the author's movement and not just the endpoints. (Level A)" > *Note 1:* The movement path exception relates to the underlying > function, not the input technique. For example, if using handwriting to > enter text, the input technique (handwriting) requires path-dependent > input, but the underlying function (text input) does not. > > Current text: > > *Note 2:* This does not forbid and should not discourage providing mouse > input or other input methods in addition to keyboard operation. > > Recommended change > > *Note 2:* This does not prohibit or discourage providing mouse input or > other input methods in addition to keyboard operation. JR: OK > · *Intent of the Success Criterion A.3.1.1:* > The intent of this success criterion is to ensure that, wherever > possible, authoring tools can be operated through a keyboard or > keyboard interface. Examples of "specific timings for individual > keystrokes" include situations where _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > would be required to repeat or execute multiple keystrokes within > a short period of time or where a key must be held down for an > extended period before the keystroke is registered. The phrase > "except where the underlying function requires input that depends > on the path of the _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>'s > movement and not just the endpoints" is included to separate those > things that cannot reasonably be controlled from a keyboard. > > · *Examples that meet the Success Criterion:* > > · > > o *Drag-and-drop feature:* > An _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > that includes a drag-and-drop feature for adding > widgets to _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > also includes allows the same widgets to be added from > a menu that can be operated with the keyboard. > > o *Drawing feature:* > An _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > has a drawing feature that enables _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > to create, size, position and rotate drawing objects > from the keyboard. > > · *Related Resources:* > o N/A > > *A.3.1.2 Avoiding Content Keyboard Traps:* The _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > prevents _keyboard traps_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Keyboard-Trap%5Codefinition:keyboardtrap> > as follows: (Level A) > > > · *(a) In the **_authoring tool user interface_* > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool-Interface%5Codefinition:authoringtooluserinterface>: > If keyboard focus can be moved to a component using the keyboard, > then focus can be moved away from that component using standard > keyboard navigation commands (e.g., TAB key); and > > · *(b) In editing views that render content:* If an _editing view_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Editing-View%5Codefinition:editingview> > (e.g., _WYSIWYG_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-WYSIWYG%5Codefinition:WYSIWYG> > view) _renders_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Content-Renderings%5Codefinition:contentrendering> > _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent>, > then a _documented_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Documentation%5Codefinition:documentation> > keyboard command is provided that will always restore keyboard > focus to a known location (e.g., the menus). > > · *Intent of the Success Criterion A.3.1.2:* > The intent of this success criterion is to ensure that neither the > _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>'s > own user interface nor any rendered _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > within _editing views_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Editing-View%5Codefinition:editingview> > "traps" keyboard focus. This is a common problem when an > interactive object is embedded in the _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent>. > The user might be able to move focus to the object (e.g., by "tab" > key), but is then unable to move the focus out using the keyboard > because keyboard control has passed to the embedded application. > > · *Examples that meet the Success Criterion:* > > o *Non-web-based authoring tool:* > A _non-web-based authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Based-UI%5Codefinition:authoringtooluserinterface(Web-based)> > has a user interface that has been thoroughly tested > by the _developer_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Developer%5Codefinition:authoringtooldevelopers> > to ensure that no _keyboard traps_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Keyboard-Trap%5Codefinition:keyboardtrap> > exist. In addition, when keyboard focus is in the > _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>'s > _WYSIWYG_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-WYSIWYG%5Codefinition:WYSIWYG> > _editing view_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Editing-View%5Codefinition:editingview>, > _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > can restore focus to the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>'s > menus at any time (i.e., by pressing the "alt" key). > > SN Comment: Remove “by the developer” – just needs to > be tested, don’t need to specify who does it. JR: OK...but then I'd like to say during development. This is afterall an informative technique rather than a normative success criteria. > o *Non-web-based authoring tool:* > A _non-web-based authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Based-UI%5Codefinition:authoringtooluserinterface(Web-based)> > has a user interface that has been thoroughly tested > to ensure that no _keyboard traps_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Keyboard-Trap%5Codefinition:keyboardtrap> > exist. In addition, when keyboard focus is in the > _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>'s > _WYSIWYG_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-WYSIWYG%5Codefinition:WYSIWYG> > _editing view_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Editing-View%5Codefinition:editingview>, > _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > can restore focus to the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>'s > menus at any time (i.e., by pressing the "alt" key). > > o > > o *Web-based authoring tool:* > A _web-based authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Based-UI%5Codefinition:authoringtooluserinterface(Web-based)> > has a user interface that has been thoroughly tested > by the _developer_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Developer%5Codefinition:authoringtooldevelopers> > to ensure that no _keyboard traps_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Keyboard-Trap%5Codefinition:keyboardtrap> > exist. In addition, because the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > relies on the _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>' > _user agents_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-User-Agent%5Codefinition:useragent> > to render the _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > being edited, the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > can rely on a feature in the _user agent_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-User-Agent%5Codefinition:useragent> > (that is cited in the _conformance claim_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Clconf-claim>) > which restores focus to the address bar. > > SN Comment: Remove “by the developer” – just needs to > be tested, don’t need to specify who does it. JR: OK > > o *Web-based authoring tool:* > A _web-based authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Based-UI%5Codefinition:authoringtooluserinterface(Web-based)> > has a user interface that has been thoroughly tested > to ensure that no _keyboard traps_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Keyboard-Trap%5Codefinition:keyboardtrap> > exist. In addition, because the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > relies on the _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>' > _user agents_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-User-Agent%5Codefinition:useragent> > to render the _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > being edited, the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > can rely on a feature in the _user agent_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-User-Agent%5Codefinition:useragent> > (that is cited in the _conformance claim_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Clconf-claim>) > which restores focus to the address bar. > > o > > · *Related Resources:* > o N/A > > *A.3.1.3 Keyboard Shortcuts:* The _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > provides keyboard shortcuts. (Level AA) > > > · *Intent of the Success Criterion A.3.1.3:* > The intent of this success criterion is to ensure that _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > using a keyboard interface can more easily access commonly used > functions of the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > in a manner that is appropriate to the operating environment > (i.e., desktop systems generally have more keystrokes available to > be assigned as shortcuts than mobile devices). > > · *Examples that meet the Success Criterion:* > > o *Non-web-based authoring tool: * > An _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > provides keyboard shortcuts for menu of its menu > functions as well as access keys in the design of its > menus and dialog boxes. The choice of shortcut keys > follows platform conventions. > > o *Social networking application on a mobile device: * > A social networking application on a mobile device has > only a very few keyboard shortcuts available on its > targeted devices. These few keyboard shortcuts are > used for the most commonly accessed functions of the > application (e.g., home, list of friends). > > > · *Related Resources:* > o The following is a non-exhaustive list of keyboard > shortcut conventions for various _platforms_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Platform%5Coplatform>: > @@JS to complete > § *Gnome/KDE: *"Gnome/KDE Keyboard > Shortcuts" /_[GNOME-KDE-KEYS]_/ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Clref-GNOME-KDE-KEYS> > > > § *Mac OS:* "Mac OS X keyboard shortcuts" > /_[MACOSX-KEYS]_/ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Clref-MACOSX-KEYS%5Coreference:MACOSX-KEYS> > > *A.3.1.4 Customize Keyboard Access:* The _author(s)_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > can customize keyboard access to the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>. > (Level AAA) > > > · *Intent of the Success Criterion A.3.1.4:* > The intent of this success criterion is to ensure that _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > using a keyboard interface have the ability to remap the > _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>'s > keyboard shortcuts in order to avoid keystroke conflicts, use > familiar keystroke combinations and optimize keyboard layout > (e.g., for one handed use). > > · *Examples that meet the Success Criterion:* > > o *Non-web-based authoring tool: * > An _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > has a keyboard setup utility that lists all of the > available keyboard shortcuts and allows _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > to associate each with any of the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>'s > commands (e.g., all of the menu commands). > > o *Web-based content management system:* > A content management system has a keyboard setup > utility that allows _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > to change the access keys that are available during > authoring. These access key rebindings are for the > _authors'_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > use only and do not affect the _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > being edited. > > o *Social networking application on a mobile device: * > A social networking application has a keyboard setup > utility that allows _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > to change their keyboard shortcuts for the site. The > remapping is saved in site cookies. > > · *Related Resources:* > o N/A > > *Guideline A.3.2 [For the authoring tool user interface] Provide authors > with enough time. [**_Return to Guideline_* > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-20090909/Overview.html%5Clgl-tool-control-time>*]* > > > *Rationale:* Some _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > who have difficulty typing, operating the mouse, or processing > information can be prevented from using systems with short time limits > or requiring a fast reaction speed, such as clicking on a moving target. > > *Recommended update: * > > *Rationale:* Some _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > who have difficulty typing, operating the mouse, or processing > information can be prevented from using systems with time limits or > requiring a fast reaction speed, such as clicking on a moving target. > > *A.3.2.1 Data Saved:* If the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > ends an _authoring session_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Session%5Codefinition:authoringsession> > due to a time limit (e.g., an authenticated session expires), then the > _author(s)_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > have the _global option_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Global-Option%5Codefinition:globaloption> > to ensure that the _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > being edited is saved. (Level A) > *Note:* For _web-based authoring tools_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Based-UI%5Codefinition:authoringtooluserinterface(Web-based)>, > this applies to any _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > that has already been submitted to the server by the _user agent_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-User-Agent%5Codefinition:useragent>. > > > > · *Intent of the Success Criterion A.3.2.1:* > The intent of this success criterion is to ensure that the work an > author has produced is saved in the event that an authoring > session is ended due to a time limit. This is especially important > for some authors with disabilities who may take longer to > accomplish tasks. > > · *Examples that meet the Success Criterion:* > > o *Web-based content management system:* > A content management system has a login timeout > function that automatically logs _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > out after 20 minutes of inactivity. The _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>' > work is automatically saved before they are logged out > for inactivity and a numerically incremented file name > is used in order to avoid overwriting _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>s' > previously saved versions. > > o *Wiki: > *A wiki has an auto-save feature that can be turned on > by _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>. > The auto-save feature always saves before a login > timeout. > > · *Related Resources:* > o N/A > > *A.3.2.2 Timing Adjustable: *For each time limit that is set by the > _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool>, > at least one of the following is true: (Level A) > > > · *(a) Turn off:* The _author(s)_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > are allowed to turn off the time limit before encountering it; or > > · *(b) Adjust:* The _author(s)_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > are allowed to adjust the time limit before encountering it over a > wide range that is at least ten times the length of the default > setting; or > > · *(c) Extend:* The _author(s)_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > are warned before time expires and given at least 20 seconds to > extend the time limit with a simple action (for example, "press > the space bar"), and the _author(s)_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > are allowed to extend the time limit at least ten times; or > > · *(d) Real-time Exception:* The time limit is a required part of > a real-time event (e.g., a collaborative authoring system), and no > alternative to the time limit is possible; or > > · *(e) Essential Exception:* The time limit is essential and > extending it would invalidate the activity; or > > · *(f) 20 Hour Exception:* The time limit is longer than 20 hours. > > · *Intent of the Success Criterion A.3.2.2:* > The intent of this success criterion is to ensure that _authoring > tools_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > provide _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > with disabilities adequate time to perform their tasks. Any > process that happens without _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > initiation after a set time or on a periodic basis is a time > limit. This includes partial or full updates of the screen (for > example, page refresh), or the expiration of a window of > opportunity for an _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > to react to a request for input. It also includes user interface > functionality that is advancing or updating at a rate beyond the > _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors>'s > ability to read and/or understand it. In other words, animated, > moving or scrolling information introduces a time limit. > Generally, turning off time limits is better than customizing the > length of time limits, which is better than requesting more time > before a time limit occurs. In some cases, however, it is not > possible to change the time limit (e.g., a collaborative > _authoring session_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Session%5Codefinition:authoringsession>) > and exceptions are therefore provided for those cases. > > · *Examples that meet the Success Criterion:* > > o *Web-based content management system:* > A content management system has a login timeout > function that automatically logs _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > out after 20 minutes of inactivity. One minute before > the automatic log out, the system notifies _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > that the log out will occur unless they cancel the > notification (meeting (c)). The system also includes a > preference setting that lets _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > set the timing of the notification up to 10 minutes > before the automatic logout (meeting (b)). > > o *Real-time collaborative editing system:* > A collaborative editing system allows multiple > _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > to edit the same _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > document simultaneously. An integral part of the > real-time collaborative activity is that any _author_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > may edit or delete what others have just authored > (meeting (d)). > > · *Related Resources:* > o N/A > > *A.3.2.3 Moving Targets:* If a user interface component is moving (e.g., > animated vector graphic), then the _author(s)_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > have the _option_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Global-Option%5Codefinition:globaloption> > to stop the movement. (Level A) > > > · *Intent of the Success Criterion A.3.2.3:* > The intent of this Success Criterion is to ensure that _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > are not prevented from using the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > by a requirement for fast reactions. > > · *Examples that meet the Success Criterion:* > > o *Timeline-based authoring tool:* > A timeline-based interactive _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > editor has an indicator of the current position on the > timeline that _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > can click and drag. When the interactive _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > is being previewed, the indicator moves along the > timeline which can make it difficult to target with > the mouse. In this case, _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > can stop the indicator from moving with the "Stop" button. · *Related Resources:* > o N/A > > *Guideline A.3.3 [For the authoring tool user interface] Help authors > avoid flashing that could cause seizures.[**_Return to Guideline_* > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-20090909/Overview.html%5Clgl-tool-prevent-flash>*]* > > > *Rationale:* Flashing can cause seizures in _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > with photosensitive seizure disorder. > > *A.3.3.1 Static View Option:* If an _editing view_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Editing-View%5Codefinition:editingview> > _renders_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Content-Renderings%5Codefinition:contentrendering> > time-based content (e.g., animations), the _author(s)_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > have the _global option_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Global-Option%5Codefinition:globaloption> > of rendering only the initial state of time-based _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent>. > (Level A) > > > · *Intent of the Success Criterion A.3.3.1:* > The intent of this success criterion is to ensure that _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > with photosensitive seizure disorder can use the _authoring tool_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Authoring-Tool%5Codefinition:authoringtool> > to open time-based _web content_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Web-Content%5Codefinition:webcontent> > without risk. > > · *Examples that meet the Success Criterion:* > > o *Blog: > *A blogging tool allows _authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > to import of _video_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Video%5Codefinition:video> > files. _Authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > have the option to turn off an auto-play feature so > that the _video_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Video%5Codefinition:video> > files are not played until a "Play" button is activated. > > o *WYSIWYG web page editor: * > A _WYSIWYG_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-WYSIWYG%5Codefinition:WYSIWYG> > _editing view_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Editing-View%5Codefinition:editingview> > is capable of rendering Javascript in real time. > _Authors_ > <http://www.w3.org/WAI/AU/2009/ED-ATAG20-TECHS-20090909/%5Cldef-Author%5Codefinition:authors> > have the option to turn off the real time rendering > feature, so that the Javascript is not rendered until > a "Play" button is activated. > > · *Related Resources:* > o N/A > > Sueann Nichols > > 877-202-9272 (t/l) 930-0636 > ssnichol@us.ibm.com > IBM Human Ability & Accessibility Center > http://www.ibm.com/able -- Jan Richards, M.Sc. User Interface Design Lead Adaptive Technology Resource Centre (ATRC) Faculty of Information University of Toronto Email: jan.richards@utoronto.ca Web: http://jan.atrc.utoronto.ca Phone: 416-946-7060 Fax: 416-971-2896
Received on Monday, 19 October 2009 06:11:13 UTC