Here is a list of some new IA2 object attributes. Thanks for a pre-review by Alex and Jamie.
Please review these additions. The current set is listed at: https://www.linuxfoundation.org/collaborate/workgroups/Accessibility/IAccessible2/ObjectAttributes In new section, "Common Attributes" Name: explicit-name Values: true, false Default: false Reference: Comments: (see the following) Indicates that a content author has provided ancillary text in addition to the primary text of an object and that the server has chosen to use that ancillary text for this object's accessible name in preference to the object's primary text. A true value indicates that the accessible name is different from, and more meaningful than, the text that is returned from IAccessibleText::text. Typically an object's accessible name is taken directly from the object's textual content and is equivalent to the text from IAccessibleText::text, but a true value is returned when the server has chosen to use ancillary text rather than the accessible's primary textual content when generating the accessible name. Some examples that could be seen in an IAccessible2 implementation of a web browser are: 1) <a href="http://www.adomain.com";>content</a> In this case the accessible name will be "content" and explicit-name will be false. 2) <a href="http://www.adomain.com"; title="a title">content</a> If the title text is used for the accessible name, explicit-name will be true. 3) <a href="http://www.adomain.com"; aria-label="a label">content</a> If the aria-label text is used for accessible name, explicit-name will be true. 4) <div id="label">a label</div><div role="radio" aria-labelledby="label">content</div> If the label text is used for the accessible name, explicit-name will be true. If this value is true assistive technology may choose to present the user with the accessible name rather than the text from IAccessibleText::text. and these from the Gecko spec at https://developer.mozilla.org/en-US/docs/Accessibility/AT-APIs/Gecko/Attrs Name: draggable Values: true, false Default: false Reference: Comments: true when the accessible object can be grabbed. Name: dropeffect Values: copy, move, link, execute, popup, none Default: none Reference: http://www.w3.org/TR/wai-aria/states_and_properties#aria-dropeffect Comments: Indicates what functions can be performed when the dragged object is released on the drop target. The values are defined as: - copy: A duplicate of the source object will be dropped into the target. - move: The source object will be removed from its current location and dropped into the target. - link: A reference or shortcut to the dragged object will be created in the target object. - execute: A function supported by the drop target is executed, using the drag source as an input. - popup: There is a popup menu or dialog that allows the user to choose one of the drag operations (copy, move, link, execute) and any other drag functionality, such as cancel. - none: No operation can be performed; effectively cancels the drag operation if an attempt is made to drop on this object. Name: grabbed Values: true, false Default: false Reference: Comments: true when the accessible object has been selected for dragging. Name: sort Values: ascending, descending, none Default: none Reference: http://www.w3.org/TR/wai-aria/states_and_properties#aria-sort Comments: If the value is ascending or descending this indicates that an object's items are sorted and the sorting algorithm used. In new section, "Live Region Attributes" Name: atomic Values: true, false Default: false Reference: http://www.w3.org/TR/wai-aria/states_and_properties#aria-atomic Comments: True when all the objects in the accessibility tree below this object should be presented as a whole, when changes within it are considered important enough to be presented automatically. Name: live Values: off, polite, assertive Default: off Reference: http://www.w3.org/TR/wai-aria/states_and_properties#aria-live Comments: A hint as to whether changes within the current accessibility subtree should be automatically presented. Additional information may be provide by the object attributes atomic and relevant. The values are defined as: - off: Updates to the region will not be presented to the user unless the assistive technology is currently focused on that region. - polite: Assistive technologies should announce updates at the next graceful opportunity, such as at the end of speaking the current sentence or when the user pauses typing. - assertive: This information has the highest priority and assistive technologies should notify the user immediately. Because an interruption may disorient users or cause them to not complete their current task, authors should not use the assertive value unless the interruption is imperative. Name: relevant Values: all, or a space delimited list of one or more of these values: additions, removals, text Default: additions text Reference: http://www.w3.org/TR/wai-aria/states_and_properties#aria-relevant Comments: Describes what kinds of changes are informational, as opposed to presentational. The four possible values are defined as: - text: Notify if there was a change in the text of any of the accessible objects making up the live region. - additions: Notify if any accessible objects were added to the live region. - removals: Notify if any accessible objects were removed from the live region. - all: Equivalent to the combination of the above three values. Name: container-atomic Values: true, false Default: false Reference: https://developer.mozilla.org/en-US/docs/AJAX/WAI_ARIA_Live_Regions_API_Support Comments: This object is a descendant in the accessibility tree of an object which has the atomic object attribute. If true, the IA2_RELATION_MEMBER_OF relation will point to the root of the atomic region. Name: container-busy Values: true, false Default: false Reference: https://developer.mozilla.org/en-US/docs/AJAX/WAI_ARIA_Live_Regions_API_Support Comments: The current changes in the live region are not yet complete. A state change event will be fired on the root object of the live region once it no longer has state for STATE_SYSTEM_BUSY. The entire atomic region should be presented once when it is finally no longer busy. Name: container-live Values: off, polite, assertive Default: off Reference: https://developer.mozilla.org/en-US/docs/AJAX/WAI_ARIA_Live_Regions_API_Support Comments: This object is a descendant in the accessibility tree of an object which has the live object attribute. The value of this attribute will match that of the root of the current live region. Name: container-relevant Values: all, or a space delimited list of one or more of these values: additions, removals, text Default: additions text Reference: https://developer.mozilla.org/en-US/docs/AJAX/WAI_ARIA_Live_Regions_API_Support Comments: This object is a descendant in the accessibility tree of an object which has the relevant object attribute. The value of this attribute will match that of the root of the current live region. Name: event-from-input Values: true, false Default: Reference: https://developer.mozilla.org/en-US/docs/AJAX/WAI_ARIA_Live_Regions_API_Support Comments: True if the root cause of this event was explicit user input (as opposed to a programmatic change). In a new section labeled Value Attributes Name: valuetext Values: <string> Default: Reference: Comments: A text equivalent to the current value, such as "High" in a slider. I'll also add a link to the Gecko spec for an example of object attributes which has been specified for a HTML specific environment. -- *Pete Brunet* a11ysoft - Accessibility Architecture and Development (512) 467-4706 (work), (512) 689-4155 (cell) Skype: pete.brunet IM: ptbrunet (AOL, Google), ptbru...@live.com (MSN) http://www.a11ysoft.com/about/ Ionosphere: WS4G
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