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Add aria-reflection.html and virtual-accessibility-nodes.html #117

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Add aria-reflection.html and virtual-accessibility-nodes.html
May 29, 2018
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May 30, 2018
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759 changes: 759 additions & 0 deletions spec/aria-reflection.html
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133 changes: 133 additions & 0 deletions spec/computed-accessibility-tree.html
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<!DOCTYPE html>
<html>
<head>
<title>
Accessibility Object Model, Phase 4
</title>
<meta charset='utf-8'>
<script src='https://www.w3.org/Tools/respec/respec-w3c-common' async
class='remove'>
</script>
<script class='remove'>
/*Make tidy happy*/
var respecConfig = {
// specification status (e.g. WD, LCWD, WG-NOTE, etc.). If in doubt use ED.
specStatus: "unofficial",
// the specification's short name, as in http://www.w3.org/TR/short-name/
shortName: "aom",

// if your specification has a subtitle that goes below the main
// formal title, define it here
// subtitle : "an excellent document",

// if you wish the publication date to be other than the last modification, set this
// publishDate: "2009-08-06",

// if the specification's copyright date is a range of years, specify
// the start date here:
// copyrightStart: "2005"

// if there is a previously published draft, uncomment this and set its YYYY-MM-DD date
// and its maturity status
// previousPublishDate: "1977-03-15",
// previousMaturity: "WD",

// if there a publicly available Editor's Draft, this is the link
// edDraftURI: "http://berjon.com/",

// if this is a LCWD, uncomment and set the end of its review period
// lcEnd: "2009-08-05",

// editors, add as many as you like
// only "name" is required
editors: [
{
name: "Alice Boxhall"
, url: "http://google.com"
, mailto: "aboxhall@google.com"
, company: "Google"
, companyURL: "http://google.com/"
},
{
name: "James Craig"
, url: "http://apple.com"
, mailto: "jcraig@apple.com"
, company: "Apple"
, companyURL: "http://apple.com/"
},
{
name: "Dominic Mazzoni"
, url: "http://google.com"
, mailto: "dmazzoni@google.com"
, company: "Google"
, companyURL: "http://google.com/"
},
{
name: "Alexander Surkov"
, url: "http://mozilla.org/"
, mailto: "surkov.alexander@gmail.com"
, company: "Mozilla"
, companyURL: "http://mozilla.org/"
},
],
// name of the WG
// wg: "None",

// URI of the public WG page
// wgURI: "http://example.org/really-cool-wg",

// name (without the @w3c.org) of the public mailing to which comments are due
// wgPublicList: "spec-writers-anonymous",

// URI of the patent status for this WG, for Rec-track documents
// !!!! IMPORTANT !!!!
// This is important for Rec-track documents, do not copy a patent URI from a random
// document unless you know what you're doing. If in doubt ask your friendly neighbourhood
// Team Contact.
// wgPatentURI: "",
// !!!! IMPORTANT !!!! MAKE THE ABOVE BLINK IN YOUR HEAD
};
</script>
</head>
<body>
<section id="abstract">
<p>
This document is a placeholder for
the spec for "Accessibility Tree Introspection",
a part of the AOM project.
For background, please refer to the
<a href="https://github.com/WICG/aom/blob/master/explainer.md">Accessibility Object Model Explainer</a>.
</p>
</section>
<section id="computedtree">
<h2>
Phase 4: Computed Accessibility Tree
</h2>
<p>
The Computed Accessibility Tree API will allow authors to
access the full computed accessibility tree - all computed
properties for the accessibility node associated with each
DOM node, plus the ability to walk the computed tree
structure including virtual nodes.
</p>
<p>
This will make it possible to:
</p>
<ul>
<li>write any programmatic test which asserts anything about the semantic properties of an element or a page.
<li>build a reliable browser-based assistive technology - for example, a browser extension which uses the accessibility tree to implement a screen reader, screen magnifier, or other assistive functionality; or an in-page tool.
<li>detect whether an accessibility property has been successfully applied (via ARIA or otherwise) to an element - for example, to detect whether a browser has implemented a particular version of ARIA.
<li>do any kind of console-based debugging/checking of accessibility tree issues.
react to accessibility tree state, for example, detecting the exposed role of an element and modifying the accessible help text to suit.
</ul>
<p>
One implication of implementing this phase is that all browsers must agree on
exposing the *same* accessibility tree for the same given webpage, otherwise
differences will invariably lead to authored pages that work in some browsers
but not others. Care must be taken to define this phase in such a way that
maintains a high degree of compatibility between browsers, without exposing any
internal details and nuances.
</p>
</section>
</body>
</html>
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