- From: Wendy Chisholm <wendy@w3.org>
- Date: Mon, 10 Jan 2005 18:53:37 -0500
- To: wai-gl <w3c-wai-gl@w3.org>
- Message-ID: <41E31581.40907@w3.org>
The summary of the 28 issues for Guideline 1.1 is attached as an HTML
document and included as text below. I've grouped the issues into the
following 5 groups:
Close without action,
Adopt proposal and close,
Requires further action or discussion,
Needs clarification from the reviewer,
Elephants.
Best,
--wendy
text-equiv issues summary
[1]Guideline 1.1 (text-equiv) issues.
[1] http://trace.wisc.edu/bugzilla_wcag/issuereports/text-equiv_issues.php
Overview of issues
* [2]Close without action
+ 170, 373, 664, 665, 791, 890, 951, 1004, 1024, 1078, 1082
(although we should discuss first), 1232, 1321, 1322
* [3]Adopt proposal and close
+ 404 - new examples,
+ 437 - slight change to example title,
+ 588 - addition to first benefit,
+ 663 - an additional benefit
* [4]Requires further action or discussion
+ 587 - wendy repropose definitions of text, non-text content,
and Unicode,
+ 666 - metadata,
+ 937 - propose that these are techniques for General
techniques and not for inclusion in the guidelines,
+ 1079 - contains a clarification, but not sure it is an
improvement
+ 1207 - closing issue 587 should close this issue
* [5]Needs clarification from the reviewer
+ 1080 - unclear if the reviewer feels a change is needed and
if so, what should be changed. i.e., not sure how to address.
+ 1104 - unclear where the link is. Believe this is an HTML
Techniques issue and this is a comment about the "noembed"
technique.
+ 1138 - unclear how text altneratives can have a higher
priority when they are (and always have been) highest
priority.
* [6]Elephants
+ 895 - provide text alternatives for scripts, applications,
etc. ala Checkpoint 6.3 from WCAG 1.0? related to baseline
issue.
+ 1075 - Text alternatives that are not explicitly associated
are sometimes okay. potential rewording of existing
criterion.
Close without action
[7]Issue 170 - accessibility of advertising
[7] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=170
Issue: What do we want to require and at what level in terms of
accessibility for advertising which is pushed onto a web site?
[8]Notes from 18 Sept 2003 telecon suggest, "The suggestion was that
sites be allowed to claim conformance even if advertisements did not
conform as long as the advertisements did not block access to the rest
of the content." However, that was at a time when we were trying to be
extremely explicit. More recently, we have decided to provide the
basics (with broad caveats where necessary), but to leave the
case-by-case issues to policy makers. Also, Level 1 success criteria
in Guideline 1.1 is written in such a way that if the developers of a
site feel that ads are functional, they can provide a label. If ads
are something that can be skipped, mark it so that it can be ignored.
[8] http://lists.w3.org/Archives/Public/w3c-wai-gl/2003JulSep/0569.html
Propose: No change. Close this issue.
[9]Issue 373 - add using text-to-speech to 1.1 benefits
[9] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=373
In a previous version, the first benefit said, "...have the text read
aloud to them" which could be interpreted as, "read by a person." The
issue is a request to clarify that it is read through speech
synthesis.
The 19 November draft says, "People who are blind, have low vision,
have cognitive disabilities or have trouble reading text for any
reason can have the text read aloud to them by assistive technology."
The phrase, "by assistive technology" should clarify this issue.
Propose: No change. Close this issue.
[10]Issue 664 - importance of text description of visual appearance of images
used buttons
[10] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=664
The comment is specific to a previous version of Example 1. The
reviewer believes it is "important to provide a textual description of
the appearance of an image used to represent a button in order to
allow effective communication between a person using the textual
description and a person using the visual presentation. For example,
it poses a significant problem when a person who is blind tells a
coworker to click on the "delete button" when the sighted user sees a
picture of a garbage can-and vice versa."
Propose: Close this issue. Respond to the reviewer that a text
alternative fulfills our purpose which is to ensure that the content
is perceivable and usable to someone with a disability. How they use
that information to interact with others should be their
responsibility.
[11]Issue 665 - a screen reader might read...
[11] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=665
Several comments on a previous example. Significant changes were made
to the 19 November draft to provide a clearer example.
Propose: Close this issue.
[12]Issue 791 - Benefits - first benefit is not applicable to this guideline
[12] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=791
The reviewer says that Guideline 1.1 does not benefit people who have
difficulty reading text and that the first benefit should read,
"People who are blind, have low vision, or have cognitive disabilities
can have the text read aloud to them by assistive technology."
Some people with reading disabilities use tools that both read text
aloud and highlight the words being read. Wouldn't it be confusing if
their tools read, "image" for images? Part of someone's reading
disability could be the inability to recognize visual information in
general. Therefore, they might need assistance determining the purpose
of the non-text content.
Propose: no change. close issue.
[13]Issue 890 - Clarification for border and spacer images
[13] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=890
The primary theme of the reviewer's comment (about the 11 March 2004
WD) is that "This guideline does not seem to leave any room for a null
alt attribute." Recent drafts include the new criterion: "Non-text
content that does not provide information, functionality, or sensory
experience is marked such that it can be ignored by assistive
technology."
Propose: no change. close issue.
[14]Issue 951 - Ease of access
[14] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=951
Reviewer says, "This checkpoint states a requirement for
text-equivalent content, but it is also important to stress the need
for <em>ease of access</em> to this content."
Propose: This is a user agent issue. Close the issue, no changes.
[15]Issue 1004 - Clarifications for 1.1, level 1 criterion
[15] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1004
Proposals from September should address the issues. Were incorporated
into 19 November draft.
Propose: close the issue.
[16]Issue 1024 - Text alternatives should be meaningful
[16] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1024
Another request for clarifying "null alt-text" which is covered by,
"Non-text content that does not provide information, functionality, or
sensory experience is marked such that it can be ignored by assistive
technology."
Propose: Close this issue.
Issue 1078 - duplicate of 1075
duplicate.close.
[17]Issue 1082 - A success criterion is needed that covers when a large
amount of text is needed to ensure equivalency.
[17] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1082
Reviewer says that to provide long descriptions of non-text content
(e.g., a chart - you may have an entire page of description) and you
may want to include it on the same page, not via longdesc
(html-specific). However, the current wording of the success criterion
wouldn't allow in-page description because the text alternative must
be explicitly associated with the non-text content.
The reviewer proposes:
"Each instance of non-text content has at least one text
alternative of fewer than 150 characters that is explicitly
associated it...."
and adding another Level 1 success criteria: "Text alternatives of
more than 150 characters are provided either inline or via an
adjacent text link."
There are several issues with the proposal:
1. It is English specific.
2. 150 is either arbitrary or influenced by an existing tool.
3. It is HTML specific. Other technologies do not provide multiple
ways to associate text alternatives and it is the goal of the
XHTML WG that img will be replaced by something more generic (ala
object) so that any object can be embedded in the same way (this
goes back to the original discussions of img and reactions to
[18]Andreesen's proposal and subsequent proposals about a "fig"
element to include figures.)
[18] http://www.webhistory.org/www.lists/www-talk.1993q1/0182.html
The Techniques Task Force has been wrestling for months with [19]a
test for short alt-text and have been unable to resolve the issue.
Perhaps a discussion by the WCAG WG will shed light, but it seems like
a rat hole.
[19] http://www.w3.org/WAI/GL/WCAG20/tests/test3.html
I believe that the existing success criterion say that the text
alternative should be as long as needed to satisfy the criterion.
Then, it is up to technology-specifics to determine if it is long or
short.
Propose: no change. close.
[20]Issue 1232 - Issue Summary for guideline 1.1 (text-equiv)
[20] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1232
voila!
[21]Issue 1321 - Alt text for graphics should be lower priority
[21] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1321
The reviewer writes:
it is my opinion that using Alt tags for graphics, should be a
Priority 2, or 3 as I've run into too many companies/businesses
that think just because they have alt tags on their images that
their site is accessible. And they don't have to do anything more
to achieve true accessibility.
While some organizations do not understand the breadth of techniques
for making content accessible, if alt-text is moved to level 2 or 3 it
is less likely to be implemented and it doesn't mean that people will
shift their focus to other techniques. Instead, the web community
needs to better educate developers about the wide range of techniques
that are needed to make content accessible.
Propose: Decline. Close this issue.
Issue 1322 is duplicate of 1321.
Close.
Adopt proposal and close
[22]Issue 404 - More examples for text-equiv checkpoint
[22] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=404
Requests to clarify 1.1 via examples, particularly null alt-text.
There are currently 5 examples for Guideline 1.1:
Success Criteria Corresponding Examples
Level 1 #1 - For all non-text content that is functional, such as
graphical links or buttons, text alternatives identify the purpose or
function of the non-text content.
[Existing] Example 1: an image used as a button.
A magnifying glass icon is used to link to the search page of a Web
site. A screen reader identifies the button as a link and speaks the
text alternative, "Search."
Level 1 #2 - For all non-text content that is used to convey
information, text alternatives convey the same information.
[Existing] Example 2: a data chart.
A bar chart compares how many widgets were sold in June, July, and
August. The short label says, "Figure one - Sales in June, July and
August." The longer description identifies the type of chart, provides
a high-level summary of the data comparable to that available from the
chart, and provides the data in a table.
Level 1 #2 - For all non-text content that is used to convey
information, text alternatives convey the same information.
[Existing] Example 3: a recording of a speech
The link to an audio clip says, "Chairman's speech to the assembly." A
link to a text transcript is provided immediately after the link to
the audio clip.
Level 1 #3 - For non-text content that is intended to create a
specific sensory experience, such as music or visual art, text
alternatives identify and describe the non-text content.
[Existing] Example 4: a recording of a symphony.
The link to an audio file says, "Beethoven's 5th Symphony performed by
the Vienna Philharmonic Orchestra."
Level 1 #2 - For all non-text content that is used to convey
information, text alternatives convey the same information.
[Existing] Example 5: an animation that illustrates how a car engine
works.
An animation shows how a car engine works. There is no audio and the
animation is part of a tutorial that describes how an engine works.
All that is needed is a description of the image. From "How car
engines work: Internal combustion"
Level 1 #4 - Non-text content that does not provide information,
functionality, or sensory experience is marked such that it can be
ignored by assistive technology. [Proposed] Example 6: a pair of
images used to create a visual effect.
Two images are used to create curved edges on a "tab" interface. The
images do not provide information, functionality, or a sensory
experience and are marked such that they can be ignored by an
assistive technology.
Level 1 #5 - Any text alternatives are explicitly associated with the
non-text content. There are issues with this criterion. Propose that
we do not create an example for it since it would be
technology-specific.
Level 1 #6 - For live audio-only or live video-only content, such as
internet radio or Web cameras, text alternatives describe the purpose
of the presentation or a link is provided to alternative real-time
content, such as traffic reports for a traffic Web camera [Proposed]
Example 7: an internet radio station.
A radio station broadcasts over the internet. The station's Web site
describes the type of music played, a schedule of the shows, and the
"current song" is updated each time the DJ starts a new track.
Interviews are recorded and published in the archives. Transcripts of
the archived interviews are provided ala Guideline 1.2. [@@ expect
this will be controversial. Also, I'm describing a typical internet
radio site, not necessarily all of the things needed to make it
accessible. May be confusing.]
[Proposed] Example 8: a traffic Web camera.
A Web site allows end-users to select from a variety of Web cameras
positioned throughout a major city. After a camera is selected, the
image updates every 2 minutes. A short text alternative identifies the
Web camera as, "TraffiCam." The site also provides a table of travel
times for each of the routes covered by the Web cameras. The table is
updated every 2 minutes.
Did not propose examples for criteria other than Level 1 since only
other criterion is level 3 and is real-time captioning.
[23]Issue 437 - Interpretation of Example 4
[23] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=437
The reviewer misinterprets what was example 4 (now is example 3: a
recording of a speech) thinking that it was a video recording, when it
is only an audio clip. Therefore, since it is only audio it doesn't
need captions and a transcript is the appropriate solution (as
described in the example).
Propose: Change the "title" of this example from "a recording of a
speech" to "an audio recording of a speech (no video)" and close the
issue.
[24]Issue 588 - addition to first benefit under 1.1
[24] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=588
Add "...or otherwise transformed to different presentation format
(e.g. font, text size)" to the first bullet under Benefits.
Propose: Accept the edit so that the first benefit reads: People who
are blind, have low vision, have cognitive disabilities or have
trouble reading text for any reason can have the text read aloud to
them by assistive technology or otherwise transform the presentation
of the text to meet their needs (e.g., change the font face, the text
size, or the background and foreground colors).
[25]Issue 663 - additional benefits for 1.1
[25] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=663
The reviewer proposes eight additional benefits for guideline 1.1 that
are not accessibility-related but demonstrate how providing text
altneratives can have additional benefits. Instead of providing such a
detailed list, propose a benefit that summarizes the additional
benefits and that general techniques will either link to a resource
that describes additional benefits in more detail or include a more
thorough discussion.
Propose: Add another benefit: Additionally, text alternatives support
the ability to search for non-text content and to repurpose content in
a variety of ways.
Requires further action or discussion
[26]Issue 587 - definition of text equivalent
[26] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=587
Comment about the definition of text equivalent,
This is not a definition. I would first define "text" as code
representing written language, that is a one-to-one mapping of
alphabetic and numeric symbols. Then define "text-equivalent" as
text that serves to communicate substantially equivalent content as
another representation such as an image.
While this comment is about the June 2003 draft, we use the same
definition in the 19 November 2004 draft (although the term has
changed from "text equivalent" to "text alternative"). The reviewer
suggests to define "text" and then define "text equivalent." In
September 2004, I [27]proposed definitions for text, unicode, and
non-text content (for [28]issue 673). Richard and Martin responded, so
i [29]proposed a modification. [30]Gregg had a concern about ASCII
art. We discussed at the [31]09 Sept 2004 telecon.
[27] http://lists.w3.org/Archives/Public/w3c-wai-gl/2004JulSep/0602.html
[28] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=673
[29] http://lists.w3.org/Archives/Public/w3c-wai-gl/2004JulSep/0672.html
[30] http://lists.w3.org/Archives/Public/w3c-wai-gl/2004JulSep/0605.html
[31] http://w3.org/2004/09/09-wai-wcag-irc#T20-29-45
Propose: Action wendy: propose new definitions of text, non-text
content, and Unicode based on previous discussions. After we agree on
definitions and close issue 673, propose a definition of text
alternative based on new definitions of text, non-text content, and
Unicode.
[32]Issue 666 - UA support for obtaining textual descriptions and extraneous
links
[32] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=666
The comment is in response to the following phrase from an example "A
link to a text transcript is provided immediately after the clip."
Reviewer says that (when supported) metadata should be used to
associate the link with the content it is the alternative for. This
relates to the issue about excplicitly linking content with text
alternatives. It seems more techniquey than a suggestion for a change
in success criterion. Therefore, not sure what to do with it. Since it
doesn't require a change in SC - close it? Move it to a general
techniques issue? Also, it seems related to the metadata SC that Liddy
and Jutta volunteered to write/propose.
Propose: discuss. assign an action item to follow-up with Liddy and
Jutta about metadata.
[33]Issue 937 - Examples for Guideline 1.1
[33] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=937
Comment provides examples/ideas for the level 3 criterion in the March
2004 WD, "A text document (for example, a movie script) is provided
that includes all important visual information, dialogue, and other
important sounds."
Propose: include these examples in the General techniques. No change
to guideline.
[34]Issue 1079 - Clarification of text
[34] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1079
Reviewer suggests modifying "Text-alternatives are explicitly
associated with non-text content..." to "Each instance of non-text
content has at least one text alternative that is explicitly
associated with it...."
Propose: Discuss. Not sure it is better.
[35]Issue 1207 - clarify that text description is not required
[35] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1207
The reviewer requests that we make it clear that a description is not
neede for every image. Suggests that we might provide clarification in
the definitions of "text description" or "text equivalent." Think this
is related to the definition of "text alternative" and that it relates
to [36]issue 587.
[36] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=587
Propose: Closing issue 587 should close this issue.
Needs clarification from the reviewer
[37]Issue 1080 - Image button alt text should contain same text as the image
itself.
[37] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1080
The reviewer writes (about the July 2004 draft),
For an image button containing text, the alt text should match the
text in the image. SC 1a says that for graphical buttons, the text
alternative should describe the purpose or function of the button.
Does alt text that matches the text in the image button meet this
success criteria?
The wording of SC 1a (now Level 1 Criterion #1) does not say,
"describe" it says, "identify" the purpose or function. Believe that
if the alt-text matches the text in the image, it will ususally meet
the success criterion. There may be instances where more information
is necessary if markup doesn't help give clue about purpose and if the
image text is unclear.
Propose: Ask Andi if she feels this needs a clarification and if so,
what needs to change? If no change proposed, close the issue.
[38]Issue 1104 - NOEMBED not widely used or recognized.
[38] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1104
Need clarification from Andi. The link after the SC is, "How to
provide text alternatives for all non-text content." Is this a General
techniques issue or HTML Techniques?
[39]Issue 1138 - Higher priority for text alternatives for non-text content?
[39] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1138
The reviewer says,
the Guidelines should place special emphasis, in the form of
elevated prioritisation, on the following matters already covered:
- the need to provide a text equivalent for every non-text element
Text alternatives are Level 1, except for a collated text transcript
(level 3). Need clarification from reviewer.
Propose: I have an action to request clarification from the reviewer.
Elephants
[40]Issue 895 - Propose solution for text alternatives of accessible non-text
content
[40] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=895
Major elephant. Related to baseline discussion.
[41]Issue 1075 - Text alternatives that are not explicitly associated are
sometimes okay
[41] http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=1075
Reviewer says, "if a technology doesn't support explicitly associating
a text alternative with non-text content, it should still be
conforming to provide a text equivalent another way."
Potential elephant. Needs discussion and likely someone to volunteer
to draft a proposal.
--
wendy a chisholm
world wide web consortium
web accessibility initiative
http://www.w3.org/WAI/
/--
Attachments
- text/html attachment: text-equiv-summary.html
Received on Monday, 10 January 2005 23:53:51 UTC