Action-1548: proposed note text for aria-current

Current note:
The aria-current attribute is similar to the aria-selected attribute, but 
there are important differences. For example in a listbox widget for 
choosing between pages of search results, aria-current  would be used to 
indicate the option representing the currently displayed page of results, 
whereas aria-selected would be used to indicate the page of results the 
user had selected to be displayed next.

Propose replacing the above with the following 3 notes.

Note:
Only one element in a set of elements should be marked as current with 
aria-current.

Note:
The aria-current attribute should not be used as a substitute for 
aria-selected in widgets where aria-selected has the same meaning. For 
example, in a tablist, aria-selected is used on a tab to indicate the 
currently displayed tabpanel.

Note:
In some use cases for widgets that support aria-selected, current and 
selected can have different meanings and may both be used within the same 
set of elements.
For example, aria-current="page" may be used in a navigation tree to 
indicate which page is currently displayed while aria-selected="true" 
indicates which page will be displayed if the user activates the treeitem.
Further, the same tree may support operating on one or more selected pages 
(treeitems) by way of a context menu containing options such as delete and 
move.


Matt King
IBM Senior Technical Staff Member
I/T Chief Accessibility Strategist
IBM BT/CIO - Global Workforce and Web Process Enablement 
Phone: (503) 578-2329, Tie line: 731-7398
mattking@us.ibm.com