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<!DOCTYPE html>
<html
data-bug-component="HTML5 spec"
data-bug-product="HTML a11y APIs (editor: Steve Faulkner, Cynthia Shelly, Jason Kiss, Alexander Surkov)"
data-bug-short_desc="[AAPI]: ">
<head>
<title>HTML to Platform Accessibility APIs Implementation Guide</title>
<meta charset="utf-8">
<link href="css/extra.css" rel="stylesheet">
<!--
<script src="js/jquery-1.9.0.min.js"></script>
<script src="js/jquery.details.min.js"></script>
<script src="js/html-api-map.js"></script>
-->
<script src="http://www.w3.org/Tools/respec/respec-w3c-common" async class="remove"></script>
<script class="remove">
var respecConfig = {
// document info
specStatus: "ED",
shortName: "html-aapi",
// publishDate: "2009-08-06",
previousMaturity: "WD",
previousPublishDate: "2012-10-25",
// previousURI: "http://www.w3.org/TR/2012/WD-html-aapi-20121025/",
copyrightStart: "2011",
edDraftURI: "http://rawgithub.com/w3c/html-api-map/master/index.html",
// lcEnd: "2010-08-06",
// editors
editors: [
{ name: "Steve Faulkner", company: "The Paciello Group", mailto: "sfaulkner@paciellogroup.com" },
{ name: "Cynthia Shelly", company: "Microsoft", mailto: "cyns@microsoft.com" },
{ name: "Jason Kiss", company: "New Zealand Government", mailto: "jason.kiss@dia.govt.nz" },
{ name: "Alexander Surkov", company: "Mozilla Foundation", mailto: "asurkov@mozilla.com" }
],
// WG
wg: "HTML Working Group",
wgURI: "http://www.w3.org/html/wg/",
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wgPatentURI: "http://www.w3.org/2004/01/pp-impl/40318/status"
};
</script>
<script src="js/bug-assist.js"></script>
</head>
<body>
<section id='abstract'>
This is draft documentation mapping HTML elements and attributes to accessibility API Roles, States and Properties on a variety of platforms. It provides recommendations on deriving the accessible names and descriptions for HTML elements. It also provides accessible feature implementation examples.
</section>
<section id="sotd">
<p class="warning"><strong>This document is subject to change without notice.</strong></p>
<p>This document was developed by and with the approval of the <a href="http://www.w3.org/WAI/PF/html-accessibility-tf.html">HTML Accessibility Taskforce</a>, a joint task force of the <a href="http://www.w3.org/WAI/PF/">Protocols and Formats Working Group</a> and the <a href="http://www.w3.org/html/wg/">HTML Working Group</a>.</p>
</section>
<section class='informative'>
<h2>Introduction: Accessibility <abbr title="Application Programming Interfaces">APIs</abbr></h2>
<p>To provide access to desktop GUI applications, assistive technologies originally used heuristic techniques to determine the meaning of the user interface and built an alternative off screen model. For example, a row of labels displayed horizontally near the top of an application window might be a menu. Labels with a border drawn around them might be buttons. Heuristic techniques are not always accurate, however, and require assistive technologies to be updated whenever the software application is updated.</p>
<p>A much better technique is for the software application to provide the necessary information for interoperability with assistive technology. To meet this need, platform owners have developed specialized interfaces, called accessibility <abbr title="Application Programming Interfaces">APIs</abbr>, which can be used to communicate accessibility information about user interfaces to assistive technologies. </p>
<p>In the case of static Web pages, the Document Object Model (DOM) is used to represent the structure and state of the elements in the document being rendered by a user agent. The elements of the document are organized into a hierarchy of nodes known as the <abbr title="document object model">DOM</abbr> tree. For traditional static Web pages, assistive technologies, such as screen readers, interact with user agents using the <abbr title="Document Object Model">DOM</abbr>. For UI elements that are known to be interactive, such as HTML form elements and desktop applications, assistive technologies may use platform accessibility APIs.</p>
<p>Accessibility <abbr title="Application Programming Interfaces">APIs</abbr> covered by this document are:</p>
<ul>
<li>Microsoft Active Accessibility (MSAA)</li>
<li>IAccessible2</li>
<li>User Interface Automation (UIA)</li>
<li>Linux Accessibility Toolkit (ATK) and Assistive Technology - Service Provider Interface (AT-SPI)</li>
<li>Mac OS X Accessibility Protocol</li>
</ul>
<p>If User Agent developers need to expose to other accessibility <abbr title="Application Programming Interfaces">APIs</abbr>, it is recommended that they work closely with the developer of the platform where the <abbr title="application programing interfaces">API</abbr> runs, and assistive technology developers on that platform.</p>
</section>
<section class='informative'>
<h2>Exposing HTML features that do not directly map to accessibility <abbr title="application programing interface">API</abbr> properties</h2>
<p>HTML<abbr title="application programing interfaces"></abbr> may have features that are not supported by accessibility <abbr title="Application Programming Interfaces">APIs</abbr> at the time of publication. There is not a one to one relationship between all <abbr title="Accessible Rich Internet Application">features</abbr> and platform accessibility <abbr title="application programing interfaces">APIs</abbr>. When <abbr title="Accessible Rich Internet Application">HTML</abbr> roles, states and properties do not directly map to an accessibility <abbr title="application programing interface">API</abbr>, and there is a method in the <abbr title="application programing interface">API</abbr> to expose a text string, expose the undefined role, states and properties via that method.</p>
<p>IAccessible2 and <abbr title="Accessibility Toolkit">ATK</abbr> use object attributes to expose semantics that are not directly supported in the <abbr title="application programing interfaces">APIs</abbr>. Object attributes are name-value pairs that are loosely specified, and very flexible for exposing things where there is no specific interface in an accessibility <abbr title="application programing interface">API</abbr>. For example, at this time, the HTML5 <code><a href="http://www.w3.org/html/wg/drafts/html/master/sections.html#the-header-element">header</a></code> element can be exposed via an object attribute because accessibility <abbr title="application programing interfaces">APIs</abbr> have no such role available. <!--Specific rules for exposing object attribute name-value pairs are described throughout this document, and rules for the general cases not covered are in State and Property Mapping. --></p>
<p>For accessibility <abbr title="Application Programming Interfaces">APIs</abbr> that do not have "object attributes" per se, it is useful to find a similar mechanism or develop a new interface to expose name/value pairs. Under the Mac OS X Accessibility Protocol, all getters are already simply name-value pairs and it is possible to expose new semantics whenever necessary. Keep in mind, this also requires working with the assistive technology developers to gain support for the new semantics.</p>
</section>
<section>
<h2>HTML Element to Accessibility API Role Mapping Matrix</h2>
<p><strong>Notes:</strong> </p>
<ul>
<li>A ? in a cell indicates the data has yet to be provided.</li>
<li>"Not mapped" (Not Applicable) means the element does not need to be exposed via an accessibility API. This is usually because the element is not displayed as part of the user interface.</li>
<li>User agents should return a user-presentable, localized string value for the Mac Accessibility AXRoleDescription.</li>
<li>All elements having an accessible object in IAccessible2 mapping are
supposed to implement IAccessible, IAccessible2 and IAccessible2_2 interfaces
</li>
</ul>
<div class="table-container">
<table class="map-table" id="elements">
<caption>Mappings of HTML elements to platform accessibility APIs: ARIA, MSAA + UIA Express, MSAA + IAccessible2, UIA, ATK, and AX</caption>
<thead>
<tr>
<th>HTML element</th>
<th><a href="http://www.w3.org/TR/html401/">HTML4</a></th>
<th><a href="http://www.w3.org/html/wg/drafts/html/master/">HTML5</a></th>
<th><a href="http://www.w3.org/WAI/PF/aria/">WAI-ARIA</a></th>
<th><a href="http://msdn.microsoft.com/en-us/library/dd373608%28v=VS.85%29.aspx">MSAA</a> + <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/dd561898%28v=vs.85%29.aspx">UIA Express</a></th>
<th><a href="http://msdn.microsoft.com/en-us/library/dd373608%28v=VS.85%29.aspx">MSAA</a> + <a href="http://accessibility.linuxfoundation.org/a11yspecs/ia2/docs/html/">IAccessible2</a></th>
<th><a href="http://msdn.microsoft.com/en-us/library/ms726297%28v=VS.85%29.aspx">UIA Control Type and Other Features</a></th>
<th><a href="http://people.gnome.org/%7Ebillh/at-spi-idl/html/index.html">AT-SPI</a></th>
<th><a href="http://developer.apple.com/library/mac/#documentation/Accessibility/Conceptual/AccessibilityMacOSX/OSXAXIntro/OSXAXintro.html">AX</a></th>
</tr>
</thead>
<tbody>
<tr tabindex="-1" id="el-a">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/text-level-semantics.html#the-a-element">a</a></code> <span class="el-context">(represents a <a href="http://www.w3.org/html/wg/drafts/html/master/links.html#hyperlink">hyperlink</a>)</span></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria"><code>link</code> role </td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_LINK
</div>
<div class="states">
<span class="type">States: </span>
STATE_SYSTEM_LINKED to link and all its descendants. If link is visited then STATE_SYSTEM_TRAVERSED.
</div>
<div class="actions">
<span class="type">Actions: </span>"Jump" action on link and all its descendants.
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_LINK
</div>
<div class="states">
<span class="type">States: </span>
STATE_SYSTEM_LINKED to link and all its descendants. If link is visited then STATE_SYSTEM_TRAVERSED.
</div>
<div class="actions">
<span class="type">Actions: </span>
"jump" action on link and all its descendants.
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleHyperlink; IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Hyperlink
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>ROLE_LINK
</div>
<div class="states">
<span class="type">States: </span>
If link is visited then STATE_VISITED.
</div>
<div class="actions">
<span class="type">Actions: </span>
"jump" action on link and all its descendants.
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Hyperlink; Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXLink
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>link
</div>
</td>
</tr>
<tr tabindex="-1" id="el-a-nohref">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/text-level-semantics.html#the-a-element">a</a></code> <span class="el-context">(no <code>href</code> attribrute)</span></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_TEXT
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
tag name BSTR (MSAA) and IA2_ROLE_TEXT_FRAME
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleHyperlink; IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Text
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_TEXT
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>group
</div>
</td>
</tr>
<tr tabindex="-1" id="el-abbr">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/text-level-semantics.html#the-abbr-element">abbr</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_TEXT
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
tag name BSTR (MSAA) and IA2_ROLE_TEXT_FRAME
</div>
<div class="objattrs">
<span class="type">Object attributes: </span>
"abbr" attribute on the containing <a href="#el-td">td</a> if a single child,
text content used as a value
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Text
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_TEXT
</div>
<div class="objattrs">
<span class="type">Object attributes: </span>
"abbr" attribute on the containing <a href="#el-td">td</a> if a single child,
text content used as a value
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>group
</div>
</td>
</tr>
<tr tabindex="-1" id="el-address">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/sections.html#the-address-element">address</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_TEXT
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
tag name BSTR (MSAA) and IA2_ROLE_PARAGRAPH
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Text
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_PARAGRAPH
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>AXLandmarkContentInfo
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>content information
</div>
<div class="general"><b>Note:</b> recommend AXRoleDescription of "address" to disambiguate from "contentinfo" landmark role. Refer to <a href="https://bugs.webkit.org/show_bug.cgi?id=83989">WebKit bug 83989</a></div>
</td>
</tr>
<tr tabindex="-1" id="el-area">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#the-area-element">area</a></code> <span class="el-context">(represents a <a href="http://www.w3.org/html/wg/drafts/html/master/links.html#hyperlink">hyperlink</a>)</span></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria"><code>link</code> role </td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_LINK
</div>
<div class="states">
<span class="type">States: </span>STATE_SYSTEM_LINKED
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
ROLE_SYSTEM_LINK exposed as a child of connected <a href="#el-img">img</a> element
</div>
<div class="states">
<span class="type">States: </span>
STATE_LINKED
</div>
<div class="actions">
<span class="type">Actions: </span>
jump
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleHyperlink
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Hyperlink
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>ROLE_LINK
exposed as a child of connected <a href="#el-img">img</a> element
</div>
<div class="actions">
<span class="type">Actions: </span>
jump
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Hyperlink
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXLink
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>link
</div>
</td>
</tr>
<tr tabindex="-1" id="el-area-nohref">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#the-area-element">area</a></code> <span class="el-context">(no <code>href</code> attribute)</span></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_TEXT
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
tag name BSTR (MSAA) and IA2_ROLE_SHAPE
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Text
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_TEXT
</div>
</td>
<td class="ax">
<div class="general">Not mapped</div>
</td>
</tr>
<tr tabindex="-1" id="el-article">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/sections.html#the-article-element">article</a></code></th>
<td class="html4">No</td>
<td class="html5">Yes</td>
<td class="aria"><code title="attr-aria-role-article">article</code> role </td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_GROUPING
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
ROLE_SYSTEM_DOCUMENT
</div>
<div class="states">
<span class="type">States: </span>
STATE_SYSTEM_READONLY
</div>
<div class="objattrs">
<span class="type">Object attributes: </span>
xml-roles:article
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Group
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_DOCUMENT_FRAME
</div>
<div class="objattrs">
<span class="type">Object attributes: </span>
xml-roles:article
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>AXDocumentArticle
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>article
</div>
</td>
</tr>
<tr tabindex="-1" id="el-aside">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/sections.html#the-aside-element">aside</a></code></th>
<td class="html4">No</td>
<td class="html5">Yes</td>
<td class="aria"><code title="attr-aria-role-note">complementary</code> role </td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_GROUPING
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
tag name BSTR (MSAA) and IA2_ROLE_NOTE
</div>
<div class="objattrs">
<span class="type">Object attributes: </span>
xml-roles:complementary
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Group
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_SECTION
</div>
<div class="objattrs">
<span class="type">Object attributes: </span>
xml-roles:complementary
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>AXLandmarkComplementary
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>complementary
</div>
</td>
</tr>
<tr tabindex="-1" id="el-audio">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#the-audio-element">audio</a></code></th>
<td class="html4">No</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_GROUPING
</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
ROLE_SYSTEM_GROUPING
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Group
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_PANEL
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>group
</div>
<div class="general"><b>Note:</b> UI controls within the audio element exposed as AXToolbar.</div>
</td>
</tr>
<tr tabindex="-1" id="el-b">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/text-level-semantics.html#the-b-element">b</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="general">Doesn't have an accessible. Exposed by UIA_FontWeightAttributeId of the TextRange control pattern implemented on a parent accessible.
</div>
</td>
<td class="ia2">
<div class="general">Doesn't have an accessible, exposed as
"font-weight" text attribute on the text container.
The value depends on the platform.
</div>
</td>
<td class="uia">
<div class="general">Doesn't have an accessible. Exposed by UIA_FontWeightAttributeId of the TextRange control pattern implemented on a parent accessible.
</div>
</td>
<td class="at-spi">
<div class="general">
Doesn't have an accessible, exposed as
"font-weight" text attribute on the text container.
The value depends on the platform.
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>group
</div>
</td>
</tr>
<tr tabindex="-1" id="el-base">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/document-metadata.html#the-base-element">base</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="general">Not mapped</div>
</td>
<td class="ia2">
<div class="general">Not mapped</div>
</td>
<td class="uia">
<div class="general">Not mapped</div>
</td>
<td class="at-spi">
<div class="general">Not mapped</div>
</td>
<td class="ax">
<div class="general">Not mapped</div>
</td>
</tr>
<tr tabindex="-1" id="el-bdi">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/text-level-semantics.html#the-bdi-element">bdi</a></code></th>
<td class="html4"></td>
<td class="html5"></td>
<td class="aria">none</td>
<td class="uia-express">?</td>
<td class="ia2">
<div class="general">
Doesn't have an accessible. May affect on
"writing-mode" text attribute on its text container.
</div>
</td>
<td class="uia">?</td>
<td class="at-spi">
<div class="general">
Doesn't have an accessible. May affect on
"writing-mode" text attribute on its text container.
</div>
</td>
<td class="ax"></td>
</tr>
<tr tabindex="-1" id="el-bdo">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/text-level-semantics.html#the-bdo-element">bdo</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_TEXT
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="general">
Doesn't have an accessible.
Exposed as "writing-mode" text attribute on its text container.
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Text
</div>
</td>
<td class="at-spi">
<div class="general">
Doesn't have an accessible.
Exposed as "writing-mode" text attribute on its text container.
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>group
</div>
</td>
</tr>
<tr tabindex="-1" id="el-blockquote">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/grouping-content.html#the-blockquote-element">blockquote</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_GROUPING
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
tag name BSTR (MSAA) and IA2_ROLE_SECTION
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Group
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_SECTION
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>group
</div>
</td>
</tr>
<tr tabindex="-1" id="el-body">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/sections.html#the-body-element">body</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria"><code>document</code> role</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_DOCUMENT
</div>
<div class="states">
<span class="type">States: </span>STATE_SYSTEM_READONLY
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="general">
Doesn't have an accessible. All DOM attributes are
proccessed as they belonged to its document accessible.
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Document
</div>
</td>
<td class="at-spi">
<div class="general">
Doesn't have an accessible. All DOM attributes are
proccessed as they belonged to its document accessible.
The document accessible has ROLE_DOCUMENT_FRAME.
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>group
</div>
</td>
</tr>
<tr tabindex="-1" id="el-br">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/text-level-semantics.html#the-br-element">br</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_WHITESPACE
</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
ROLE_SYSTEM_WHITESPACE
</div>
</td>
<td class="uia">?</td>
<td class="at-spi">
<div class="general">
Doesn't have an accesible. Exposed as '\n' character
via Text interface on the text container.
</div>
</td>
<td class="ax">
<div class="general">Not mapped</div>
</td>
</tr>
<tr tabindex="-1" id="el-button">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/forms.html#the-button-element">button</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria"><code>button</code> role </td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_PUSHBUTTON
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
ROLE_SYSTEM_PUSHBUTTON
</div>
<div class="states">
<span class="type">States: </span>
STATE_SYSTEM_DEFAULT if the button is default
</div>
<div class="actions">
<span class="type">Actions: </span>press
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Button
</div>
<div class="general">
?? When it is in a <menu> it defines a command. Is it still a button, or is it a menuitem??
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_PUSH_BUTTON
</div>
<div class="states">
<span class="type">States: </span>
STATE_DEFAULT if the button is default
</div>
<div class="actions">
<span class="type">Actions: </span>press
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXButton
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>button
</div>
</td>
</tr>
<tr tabindex="-1" id="el-canvas">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#the-canvas-element">canvas</a></code></th>
<td class="html4">No</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>SYSTEM_ROLE_GRAPHIC
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
tag name BSTR (MSAA) and IA2_ROLE_CANVAS
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Image
</div>
<div class="general">
NOTE: subdom elements will be mapped separately.
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_CANVAS
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXImage
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>image
</div>
</td>
</tr>
<tr tabindex="-1" id="el-caption">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/tabular-data.html#the-caption-element">caption</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="role">
<span class="type">Role: </span>ROLE_SYSTEM_TEXT
</div>
<div class="states">
<span class="type">States: </span>STATE_SYSTEM_READONLY
</div>
<div class="general">Use MSAA or UIA guidance</div>
</td>
<td class="ia2">
<div class="role">
<span class="type">Role: </span>
tag name BSTR (MSAA) and IA2_ROLE_CAPTION
</div>
<div class="relations">
<span class="type">Relations: </span>
IA2_RELATION_LABEL_FOR with containing <a href="#el-table">table</a> accessible
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
IAccessibleText2; IAccessibleHypertext2;
</div>
</td>
<td class="uia">
<div class="ctrltype">
<span class="type">Control Type: </span>Text
</div>
<div class="properties">
<span class="type">Properties: </span>UIA_LabeledByPropertyId on the parent table pointing to the UIA element for the caption element.
</div>
</td>
<td class="at-spi">
<div class="role">
<span class="type">Role: </span>
ROLE_CAPTION
</div>
<div class="relations">
<span class="type">Relations: </span>
RELATION_LABEL_FOR with containing <a href="#el-table">table</a> accessible
</div>
<div class="ifaces">
<span class="type">Interfaces: </span>
Text; Hypertext
</div>
</td>
<td class="ax">
<div class="role">
<span class="type">AXRole: </span>AXGroup
</div>
<div class="subrole">
<span class="type">AXSubrole: </span>(nil)
</div>
<div class="roledesc">
<span class="type">AXRoleDescription: </span>group
</div>
</td>
</tr>
<tr tabindex="-1" id="el-cite">
<th><code><a href="http://www.w3.org/html/wg/drafts/html/master/text-level-semantics.html#the-cite-element">cite</a></code></th>
<td class="html4">Yes</td>
<td class="html5">Yes</td>
<td class="aria">none</td>
<td class="uia-express">
<div class="general">Doesn't have an accessible. Styles used are exposed by UIA text attribute identifiers of the TextRange control pattern implemented on a parent accessible.
</div>
</td>
<td class="ia2">
<div class="general">
Doesn't have an accessible. Used styles are
mapped into text attributes on its text container.
</div>