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[Proposal] Since content focus and user interface focus are required, make characteristics normative

From: Ian B. Jacobs <ij@w3.org>
Date: Thu, 05 Jul 2001 16:24:25 -0400
Message-ID: <3B44CCF9.FE82D0FD@w3.org>
To: w3c-wai-ua@w3.org

I think that in order to ensure that user agents implement
a focus mechanism that meets the expectations of UAAG 1.0, 
checkpoints 9.1 and 9.2 in the 22 June draft [1] need to include
certain characteristics as normative. These characteristics are:

 - The focus must be persistent within the current session.
 - It must designate zero or more enabled elements, and may designate
   disabled elements.

The other required characteristics are already covered by checkpoints:

 - The user must be able to move it per checkpoints 9.3 and 9.7
 - The user must be able to trigger event handlers that the focus
   designates per 1.2 and 9.5
 - The user agent must restore it per 9.4 (when history is implemented).

This is a non-editorial change since it moves requirements into 9.1 and
but I believe that this has been our intention with respect to focus,
at least since the February face-to-face meeting in Cambridge [2].

Note: I am not proposing that we move selection characteristics into a
checkpoint. We don't need to. A selection may refer to text only
or text and images, and this doesn't affect our current selection 

 - Ian

[1] http://www.w3.org/TR/2001/WD-UAAG10-20010622/
[2] http://www.w3.org/WAI/UA/2001/03/ua-meeting
Ian Jacobs (ij@w3.org)   http://www.w3.org/People/Jacobs
Cell:                    +1 917 450-8783
Received on Thursday, 5 July 2001 16:27:08 UTC

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