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Action 222 - http://www.w3.org/WAI/UA/tracker/actions/222

From: Simon Harper <simon.harper@manchester.ac.uk>
Date: Thu, 14 Jan 2010 14:51:15 +0000
Message-ID: <4B4F2F63.1090206@manchester.ac.uk>
To: UAWG list <w3c-wai-ua@w3.org>
Hi there,

I was actioned to re update 4.6 (and have looked at this in combination 
with the implementation details. I've taken into account Greg's original 
comments as well as those expressed within the survey results. I've now 
come up with the following.

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Guideline 4.6 Text Search

4.6.1 Find:
The user can perform a search within rendered content (e.g., not hidden 
with a style) for text and text alternatives, for any sequence of 
characters from the document character set. (Level A)

4.6.2 Find Direction: The user has the option of searching forward or 
backward from any selected or focused location in content. The user will 
be notified of changes in search direction; and when the search reaches 
the upper or lower extent of the content based on the search direction. 
(Level A)

4.6.3 Match Found: When there is a match, the user is alerted and the 
viewport moves so that the matched text content is at least partially 
within it. The user can search for the next instance of the text from 
the location of the match. Or, if the caret has been moved, from its new 
location. (Level A)

4.6.4 Alert on No Match: The user is notified when there is no match or 
after the last match in content (i.e., prior to starting the search over 
from the beginning of content). (Level A)

4.6.5 Advanced Find: The user agent provides an accessible advanced 
search facility, with a case sensitive and case-insensitive search 
option, and the ability for the user to perform a search within all 
content (including hidden content and captioning) for text and text 
alternatives, for any sequence of characters from the document character 
set. (Level AA)


IMPLEMENTATION DETAILS

*Intent of Success Criterion 4.6.1 Find:
To provide a function that allows the user to easily locate desired 
information in rendered or alternative text. Give the option of 
searching the alternative content. In the case of an embedded user 
agent, (e.g. media player), the embedded user agent provides the search 
for its content.
*Examples of Success Criterion 4.6.1:
A user wants to locate a text string in a long document. The user agent 
provides a mechanism for entering the desired text string, such as a 
text box with a search button.
A user wants to search for text in all views of the document, including 
views of the text source (source view)
A user wants to search the element content of form elements (where 
applicable) and any label text.
Related Resources for Success Criterion 4.6.1:
WCAG
4.6.2,3,4,5

*Intent of Success Criterion 4.6.2 Find Direction:
To enable the user to understand and control the direction of the search.
*Examples of Success Criterion 4.6.2:
The user wishes to find previously encountered text, before the current 
location of the caret.
The user has finished searching the text before the caret and has 
reached the upper limit of the page, they now wish to continue the 
search from the bottom of the document to the current location of the caret.
*Related Resources for Success Criterion 4.6.2:
WCAG
4.6.2,3,4,5


*Intent of Success Criterion 4.6.3 Match Found:
To enable the user to jump quickly to any found text, have the text 
spoken (say), and to continue searching from that point.
*Examples of Success Criterion 4.6.3:
The user wished to find text. This text was found, and the user 
investigated further to see if it was within the desired paragraph.
*Related Resources for Success Criterion 4.6.3:
WCAG
4.6.2,3,4,5


*Intent of Success Criterion 4.6.4 Alert on No Match:
Enable the user to understand when no text has been found and the search 
has come to an end.
*Examples of Success Criterion 4.6.4:
The user searched for text, but the desire text was not found and the 
search was terminated by the User Agent.
*Related Resources for Success Criterion 4.6.4:
WCAG
4.6.2,3,4,5


*Intent of Success Criterion 4.6.5 Advanced Find:
Enable the user to formulate a more advanced search, by which they can 
specify options such as, but not limited to, case sensitivity, and the 
ability to search within invisible textual components of the content 
such as video captions.
*Examples of Success Criterion 4.6.5:
The user wishes to find text which is currently hidden (via say, the CSS 
display attributes).
The user wishes to find text with a caption so that they easily locate 
that part of the video presentation.
The user wishes to search for textual descriptions hidden within 
embedded SVG.
*Related Resources for Success Criterion 4.6.5:
WCAG
4.6.2,3,4,5

--------------

Cheers
Si.

=======================

Simon Harper
University of Manchester (UK)

Human Centred Web Lab: http://hcw.cs.manchester.ac.uk

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Received on Thursday, 14 January 2010 14:51:47 GMT

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