See also: IRC log
<trackbot> Date: 22 February 2010
<oedipus> RS: We would introduce an @adom attribute, it can be called something else
<oedipus> RS: If the sub tree content is for accessibility then the @adom marker tells the AT that it is for accessibility and browsers can also map the content to the accessibility API
<jcraig> scribe: jongunderson
<oedipus> RS: We have a problem with WCAG 2 for browsers that don't support canvas
<oedipus> RS: I tried incorporating DB content
<oedipus> RS is reading the proposal ....
<oedipus> RS: DB you asked about synchronization of @adom with canvas
<oedipus> RS reading the synchronization definition....
<oedipus> RS: Colors and zoom has no standard way to define
RS: I want to rasie the point
from last friday, if the @adom is set to false, and then would
be equally inaccessible
... This is tru, but if the author wants to be accessible it allows them to mark the information as accessible and comply with WCAG
... Do we want to stay with the @adom proposal?
... We need to put up a straw poll today to take it to the meeting on Thursday
JC: I don;t think that was my
... The issue is that several of us don't think we need the attribute
... By adding the attribute and making it false by default, there could be some accessible content that will not be marked as much
... The one exception is the message "Get a better browser", but if they do provide alternative or accessible content why do we need the marker
FO: Adding attributes by the author allows accessibility checkers to do some level of accessibility, I support the @adom attribute, I don't think it is alot of work
RS: I agree with it too
... The fall back content may be accessible, but it may not represent what is on the canvas
<Zakim> jcraig, you wanted to respond to franks point: existing canvas content is irrelevant, b/c there is no current way to make it accessible
RS: The question is does it map to what the user using the canvas is seeing and doing
<oedipus> plus 1 to jcraig
JC: We have not see much canvas
content is not a reason why we need the @adom attribute
... We should not be hung up on the fact it is not accessible yet
RS: The point is that we can make
it accessible, it comes down what is being mapped to what is
... The alternative rendering maybe accessible we just don't know
... This is how authors have been using fall back content
... I would like to hear form other people in the group
DB: This is the wrong time
... I would just mention, you could make canvas accessible, but it is very difficult, these approaches are also difficult
... I was agreeing with FO, but I am also see JC point of view, I am not optimistic about accessible content
<richardschwerdtfe> scribe: rich
<richardschwerdtfe> jon: I think we need a marker
<richardschwerdtfe> Jon: there is not guarantee what that sub content is going to be
<oedipus> scribe: jongunderson
<oedipus> JRG: would never see canvas?
RS: It has been generally agreed
if an author wants an alternative rednering would replace
... basically the sub I'll be right back , battery died
... A test group can say what do you got in there
... Rule sets will be same as being developed with the OOA, there would be manual tests
<Zakim> jcraig, you wanted to address the argument that the @adom marker will reflect author intention
<oedipus> accessible rendering of content, not canvas - if canvas contains interactive elements, must be made interactive even if canvas support turned off or not supported
JC: This @adom tag would be a marker doesn't really matter to the user, if this part of HTML 5 the authoring tools will add it by default and not really work as a marker
JC: If we can's trust authors to
make accessible content, then the attribute can also be
... Who is the marker for test tools or AT?
RS: What @adom does is say to map the sub content to the accessibility API
JC: We think all the content should be mapped to the accessibility API, why hold it back?
<Zakim> oedipus, you wanted to ask if we are drawing a distinction between access to content in canvas and access to canvas?
FO: I want to draw a parallel
with ALT text for image, you have conformance checkers to look
for ALT text
... @adom is kind of like ALT attribute for image
JC: In both cases, this is the descendant conent of the sub tree
RS: The sub content is back up
content, when the canvas content cannot be rendered
... When you want to say this content is mapped to the accessibility object tree like the controls in any GUI
... If you were to sit next to a sighted person the sub tree content should represent the sub tree content
<Zakim> jcraig, you wanted to ask frank to clarify his comment regarding img:alt :: canvas:adom
RS: If you don't set the @adom attribute the user just gets the fall back content
JC: One of the things I want to
clarify the point, the sub content would only be accessible if
the authors add this attribute, I propose it should always be
... I would like clarification of the ALT text analogy
<oedipus> agree with JC
FO: If you are using an
accessibility compliance checker could check to see if the
author did anything to make the canvas accessible, just like it
ALT attribute is missing from an image
... If ALT text had two purposes the complaince checker couldn't figure out was done
JC: A compliance checker couldn't determine if the canvas needed accessible content, it could be decorative
FO: The author then could indicate that in the sub tree content, it could say that
JC: You can also set the ALT="" just because you are lazy
FO: Some form of indicator is useful for the author to provide some information
JC: This is saying to me that the ALT text is on the page ....
RS: I don't think we are forcing the user to do anything, we are providing a way for the author to provide intent
JC: You are telling the assistive technology and the browser not to expose content unless this attribute is added
RS: Are you saying the default value is TRUE
JC: I am saying that the value
should always be true
... Why does the user care if it an exact replica or an alternative
RS: The user cares about equal
... The keyboard and the accessibility information is the same as the able bodies person sitting next to them
... Sure people can create accessible content but it provide a means to render the alternative ...
JC: What you are also saying is the focus model needs to change, this @adom flag would provide the information to ...
RS: The author would need to provide a means to render the sub content ..
JC: You mean the user agent, or the author needs to provide button
JC: That sounds like a 2010 D-Link
RS: I am not making any claims, I
don't know what the sub tree content is, it is just there, what
do I do with it?
... We have debated this for 40 minutes, do people want to submit to the proposal to a straw pole for submission to the HTML working group
<oedipus> jcraig, reminds me of details "button" child problem
<richardschwerdtfe> Proposal: Should we take the adom attribute proposal to straw vote to take it to the HTML working group?
<oedipus> fine with vote
We will take it to a straw vote in the task force, do we want to change to the text?
RS: Is there anything other than disagreement
<oedipus> rich, can you post the finalized text to the list or point to it after the meeting?
JC: The author must requirements are specific to the attribute value, they should be there regardless of the attribute
<richardschwerdtfe> The canvas element has a third boolean attribute, 4adom, to indicate if the canvas subtree is an accessible DOM sub-tree representation of what is drawn on 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element. If it is true, standard HTML elements may be used in the 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element sub-tree, however the rendering of the subtree is controlled by script through the canvas API. Wh
<richardschwerdtfe> 12adom is set to "true" the elements within the 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element MUST be rendered transparently to ensure inclusion in the HTML keyboard navigation order without effecting the visible rendering of the web page. When adom is set to "true" the 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element the must be synchronized with the canvas rendering. The default value for 12adom is
<richardschwerdtfe> false to indicate that the canvas subtree is only used as fallback content and may not be used as an accessible DOM subtree representation of what is drawn on 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element. Authors supporting an accessible 12adom sub-tree:
<richardschwerdtfe> • MUST synchronize the accessible sub-tree elements, semantics, and structure with the canvas rendering.
<richardschwerdtfe> • MUST render and maintain visible focus of the 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element subtree element on the rendered 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element
<richardschwerdtfe> • MUST render and maintain the keyboard caret insertion cursor of the canvas subtree element on the rendered 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element
<richardschwerdtfe> • SHOULD ensure that the 12file:///Users/richardschwerdtfeger/Downloads/the-canvas-element rendering reflects the user settings for font, color, and zoom
RS: If it sets it rue ...
JC: I think those requirements
should be , I guess in relation with this proposal its ok
... The last one authors should ensure, is completely separate from the @adom attribute
RS: I will change that
... Anything else?
... DB did I meet your concerns about synchronization?
DB: The link is not working for
me, there we go..
... There is not alot of content here
... I guess it is fine
RS: I have made JC change
RSL I am going to change this to ..., author should insure that the author setting os font, color and zoom regardless wether ADOM is set to be true
RS: I will send to MC after the
... The next thing
RS: Has SF make any progress on
caret tracking, he is not here though to day
... I will send this to MC to set up a straw vote
<oedipus> rich, your data dump into IRC came out very confused in minutes
This is scribe.perl Revision: 1.135 of Date: 2009/03/02 03:52:20 Check for newer version at http://dev.w3.org/cvsweb/~checkout~/2002/scribe/ Guessing input format: RRSAgent_Text_Format (score 1.00) Succeeded: s/A DOM/@adom/ Succeeded: s/A DOM/@adom/g Succeeded: s/oding/doing/ Succeeded: s/A DOM/@adom/g Succeeded: s/This is the des/In both cases, this is the des/ Succeeded: s/A DOM/@adom/g Succeeded: s/insure/ensure/ Found Scribe: jongunderson Inferring ScribeNick: jongunderson Found Scribe: rich Found Scribe: jongunderson Inferring ScribeNick: jongunderson Scribes: jongunderson, rich Present: Frank_Oliver Jon_Gunderson RichS Gregory David_Bolter James_Craig Regrets: Chaals Found Date: 22 Feb 2010 Guessing minutes URL: http://www.w3.org/2010/02/22-html-a11y-minutes.html People with action items: WARNING: Input appears to use implicit continuation lines. You may need the "-implicitContinuations" option.[End of scribe.perl diagnostic output]