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Re: Coordination issue list between Web Content and User AgentGuidelines

From: Ian Jacobs <ij@w3.org>
Date: Fri, 06 Aug 1999 16:28:08 -0400
Message-ID: <37AB4558.E7B25DA5@w3.org>
To: Jon Gunderson <jongund@staff.uiuc.edu>
Cc: w3c-wai-ua@w3.org, w3c-wai-gl@w3.org, w3c-wai-cg@w3.org, jbrewer@w3.org
Jon Gunderson wrote:
> The following link is my initial estimate of the UA and 
> WC coordination issues.
> Please review and comment to the UA list.

Coordination page [0]:
[0] http://www.w3.org/WAI/UA/wai-ua-wc-coordination.html


On 9 July, I documented resolutions [1] to the issues cited.
I believe all to be resolved except issue #3.

[1] http://lists.w3.org/Archives/Public/w3c-wai-ua/1999JulSep/0006.html

>Issue #3: Should user agents be able recognize markup for navigation bars 

Addressed in [1], but here's more info:

There are two parts to this issue, I believe: recognition of arbitrary
classification of navigation bars and recognition for known HTML markup.

I believe the UA WG has (or should) punt on the former goal. In another
version of the Guidelines, we can talk more about schemas as a good
way to identify document component semantics.

For the latter goal, Charles has proposed MAP as the proper solution
and Wendy responded [1] that the GL Group had already decided not to
recommend this solution. So the issue could be opened again in GL.

[1] http://lists.w3.org/Archives/Public/w3c-wai-ua/1999JulSep/0012.html


Reference Document: 16 July Draft of UAGL [2].

[2] http://www.w3.org/WAI/UA/WAI-USERAGENT-19990716/

1) WCAG 1.5: Until user agents render text 
equivalents for client-side image map links, provide
redundant text links for each active region of a client-side image map.

Comment: While we have several checkpoints that might cover this,
including "1.2 Ensure that the user can interact with 
all active elements of a document in a device-independent manner."
we don't have a checkpoint specifically for client-side image maps.
I propose we list this as an example after checkpoint
1.2 in the guidelines.

2) WCAG 5.3 Do not use tables for layout unless the table 
   makes sense when linearized. 

Comment: The WG has decided not to include a checkpoint requiring that
UAs be able to linearize tables (I believe in [3]).

[3] http://www.w3.org/WAI/UA/1998/12/wai-ua-f2f-19981211.html#media

Instead, the following checkpoints should cover this issue:

   7.1 Ensure that the user has access to document content, 
       including alternative representations of content.

   7.2 For dependent user agents. Ensure that the user has access to 
       the content of an element selected by the user

   8.3 For dependent user agents. Allow the user to navigate among 
       table cells of a table (notably left and right within a row 
       and up and down within a column).

3) WCAG  7.1 Until user agents allow users to control flickering, 
        avoid causing the screen to flicker.

Comment: The WG decided [3.5] that since flicker was caused by scripts,
that the following checkpoint ensured control:


   5.8 Allow the user to turn on and off support for scripts and

4) WCAG 7.2 Until user agents allow users to control blinking, 
            avoid causing content to blink (i.e., change 
            presentation at a regular rate, such as turning on
and                             off).

Comment: This is covered by the following checkpoint:

   5.6 Allow the user to turn on and off animated or blinking text. 

5) WCAG 7.3 Until user agents allow users to freeze moving content, 
   avoid movement in pages.

Comment: This may either be caused by style sheets or scripts. 
        Thus, checkpoint 5.8 and the following cover the issue:

   5.9 Allow the user to turn on and off support for user style sheets. 

6) WCAG  7.4 Until user agents provide the ability to stop the 
             refresh, do not create periodically auto-refreshing pages.

Comment: Covered by the following checkpoint:

   5.14 Allow the user to turn on and off automatic page refresh.

7) WCAG  7.5 Until user agents provide the ability to stop 
             auto-redirect, do not use markup to redirect pages

Comment: Covered by the following checkpoint:

   5.13 Allow the user to turn on and off author-specified page 
        forwards that occur after a time delay and without user 

8) 10.1 Until user agents allow users to turn off spawned windows, 
   do not cause pop-ups or other windows to appear and do not change 
   the current window without informing the user.

Comment: Covered by the following checkpoint:

   5.11 Allow the user to turn on and off support for spawned windows.

9) WCAG 10.2 Until user agents support explicit associations between 
        labels and form controls, for all form controls with
        implicitly associated labels, ensure that the label is
        properly positioned.

Comment: Covered by the following checkpoint:

   9.24 Provide the user with access to any label explicitly 
        associated with a form control.

   Note: Preserved in orientation proposal [4]


10) WCAG 10.3 Until user agents (including assistive technologies) 
    render side-by-side text correctly, provide a linear text
    alternative (on the current page or some other) for all tables 
    that lay out text in parallel, word-wrapped columns.

Comment: Although this is more about user agents getting it right
rather than ensuring some functionality, this is covered by 7.2.

11) WCAG 10.4 Until user agents handle empty controls correctly, 
    include default, place-holding characters in edit boxes
    and text areas. 

Comment: I don't think we have anything to do here. This was to
    account for incorrect legacy UA behavior.

12) WCAG 10.5 Until user agents (including assistive 
    technologies) render adjacent links distinctly, include non-link,
    printable characters (surrounded by spaces) between adjacent links. 

Comment: I believe this is covered by 7.2 and possibly the 9.5 proposed
         in [4].

13) WCAG 13.2 Provide metadata to add semantic information 
    to pages and sites.

Comment: This is only covered if you consider that support for
W3C Recommendations (checkpoint 11.2) will ensure implementation
of metadata (HTML metadata, RDF). I would consider this an
open issue: how to handle metadata.

14) 13.6 Group related links, identify the group (for user agents),
    and, until user agents do so, provide a way to bypass the group. 

Comment: I don't believe we have a checkpoint for this. We could
add one to Guideline 8 on Navigation.
Received on Friday, 6 August 1999 16:20:55 UTC

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