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<div class="section" id="accessibility-features">
<span id="id1"></span><h1>Accessibility Features<a class="headerlink" href="#accessibility-features" title="Permalink to this headline">¶</a></h1>
<p>MathJax’s mission is to provide the best tools for mathematics on the web. Naturally, this means for everyone and thus accessibility is an important concern for us.</p>
<div class="section" id="mathjax-user-interface">
<span id="mathjax-ui-a11y"></span><h2>MathJax User Interface<a class="headerlink" href="#mathjax-user-interface" title="Permalink to this headline">¶</a></h2>
<p>The MathJax user interface consists of the <a class="reference internal" href="../options/other/MathMenu.html#configure-mathmenu"><span class="std std-ref">MathJax Menu</span></a> and the various MathJax Processing Messages, cf <a class="reference internal" href="../options/hub.html#configure-hub"><span class="std std-ref">the core configuration</span></a>.</p>
<p>The user interface is localized to over 20 languages and many more partial localizations thanks to the fantastic support of <a class="reference external" href="https://translatewiki.net/wiki/Translating:MathJax">the community at TranslateWiki.net</a>.</p>
<p>The MathJax Menu also follows WCAG 2.0 guidelines. Each MathJax fragment is included in the tab order; the menu can be triggered via the space or menu key; and navigation in the menu is possible using the arrow keys.</p>
</div>
<div class="section" id="mathjax-accessibility-extensions">
<h2>MathJax Accessibility Extensions<a class="headerlink" href="#mathjax-accessibility-extensions" title="Permalink to this headline">¶</a></h2>
<p>The <a class="reference internal" href="../options/extensions/a11y-extensions.html#a11y-extensions"><span class="std std-ref">MathJax Accessibility extensions</span></a> provide several tools and features that enable universal rendering of mathematics on the web. They enhance rendering both visually and aurally. In particular:</p>
<ul class="simple">
<li>An innovative responsive rendering of mathematical content through collapsing and exploration of subexpressions.</li>
<li>An aural rendering tool providing on-the-fly speech-text for mathematical content and its subexpressions using various rule sets.</li>
<li>An exploration tool, allowing for meaningful exploration of mathematical content including multiple highlighting features and synchronized aural rendering.</li>
</ul>
<p>The Accessibility Extensions support the widest selection of browsers, operating systems, and assistive technologies as they only require support for well-supported web standards such as WAI-ARIA, in particular labels and live regions.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">We strongly suggest to use the MathJax Accessibility extensions to provide the best possible experience for all users.</p>
</div>
</div>
<div class="section" id="legacy-support-via-assistivemml-js">
<span id="screenreader-support"></span><h2>Legacy Support via AssistiveMML.js<a class="headerlink" href="#legacy-support-via-assistivemml-js" title="Permalink to this headline">¶</a></h2>
<p>Some screenreaders support MathML, MathJax’s internal format. Screenreaders like ChromeVox, JAWS (on IE), and Texthelp support MathJax directly while other screenreaders can benefit from the <a class="reference internal" href="../options/extensions/assistive-mml.html#assistive-mml"><span class="std std-ref">AssistiveMML extension</span></a>.</p>
<p>The <code class="docutils literal"><span class="pre">AssistiveMML</span></code> extension embeds visually hidden MathML alongside MathJax’s visual rendering while hiding the visual rendering from assistive technology (AT) such as screenreaders. This allows most MathML-enabled screenreaders to read out the underlying mathematics. It’s important to note that Presentation MathML is usually not expressive enough to voice it which is why screenreaders have to rely on heuristics to analyze the MathML semantically.</p>
<p>The quality of MathML support in screenreaders varies greatly, with different levels of MathML feature support, different speech rule sets, and different voicing technologies.</p>
<p>The expected result for MathJax given the current state of technology is roughly the following:</p>
<ul class="simple">
<li>the visually-hidden MathML is read out correctly by AT (i.e., not just the character strings but, e.g., <code class="docutils literal"><span class="pre"><mfrac></span></code> leads to “fraction”; this will vary with the MathML support of the screenreader).</li>
<li>the visual rendering is not read out by AT</li>
<li>the MathJax Menu triggers AT to say “clickable” before each math element.<ul>
<li>This allows keyboard users to enter the MathJax Menu via space or menu key.</li>
</ul>
</li>
<li>the visually hidden MathML does not get an outline (usually placed at an odd location due to the target of the outline being visually hidden).<ul>
<li>except in iOS VoiceOver, where this allows to hook into VoiceOver’s exploration features.</li>
</ul>
</li>
</ul>
<div class="section" id="support-matrix-assistivemml-js">
<h3>Support Matrix (AssistiveMML.js)<a class="headerlink" href="#support-matrix-assistivemml-js" title="Permalink to this headline">¶</a></h3>
<p>Below is a summary of results for MathML enabled screenreaders and the legacy AssistiveMML extension, based on tests as well as user reports.</p>
<table>
<thead>
<tr>
<th>Screenreader</th>
<th>Browser</th>
<th>OS</th>
<th>Usable?</th>
<th>Bugs</th>
</tr>
</thead>
<tbody>
<tr>
<td>ChromeVox</td>
<td>Chrome</td>
<td>any</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>NVDA</td>
<td>any</td>
<td>WinXP</td>
<td>DNA</td>
<td><a href="https://github.com/nvaccess/nvda/issues/5555#issuecomment-160598962">MathPlayer 4 does not support WinXP</a></td>
</tr>
<tr>
<td>NVDA</td>
<td>Chrome</td>
<td>any</td>
<td>DNA</td>
<td><a href="https://github.com/nvaccess/nvda/issues/5555#issuecomment-160503827">Chrome issues prevent MathML support by NVDA</a></td>
</tr>
<tr>
<td>NVDA</td>
<td>Firefox</td>
<td>Win7</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>NVDA</td>
<td>Firefox</td>
<td>Win8.1</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>NVDA</td>
<td>Firefox</td>
<td>Win10</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>NVDA</td>
<td>MS Edge</td>
<td>Win10</td>
<td>DNA</td>
<td><a href="https://github.com/nvaccess/nvda/issues/5555#issuecomment-160598962">Edge issues prevent MathML support by NVDA</a></td>
</tr>
<tr>
<td>NVDA</td>
<td>IE11</td>
<td>Win8.1</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>NVDA</td>
<td>IE10</td>
<td>Win7</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>NVDA</td>
<td>IE9</td>
<td>Win7</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>JAWS</td>
<td>any</td>
<td>WinXP</td>
<td>DNA</td>
<td><a href="http://www.freedomscientific.com/Downloads/jaws/jaws16features#JAWSXP">JAWS 15 was the last version to support Windows XP but MathML support in JAWS starts with JAWS 16</a></td>
</tr>
<tr>
<td>JAWS</td>
<td>Chrome</td>
<td>any</td>
<td>DNA</td>
<td><a href="http://www.freedomscientific.com/Downloads/jaws/jaws16features">JAWS only supports IE and Firefox</a></td>
</tr>
<tr>
<td>JAWS</td>
<td>Firefox</td>
<td>Win8.1</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>JAWS</td>
<td>Firefox</td>
<td>Win7</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>JAWS</td>
<td>Firefox</td>
<td>Win10</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>JAWS</td>
<td>MS Edge</td>
<td>Win10</td>
<td>DNA</td>
<td><a href="http://www.freedomscientific.com/Downloads/jaws/jaws16features">JAWS only supports IE and Firefox</a></td>
</tr>
<tr>
<td>JAWS</td>
<td>IE11</td>
<td>Win8.1</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>JAWS</td>
<td>IE10</td>
<td>Win7</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>JAWS</td>
<td>IE9</td>
<td>Win7</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>VoiceOver</td>
<td>Safari</td>
<td>OSX</td>
<td>+1</td>
<td>see notes below</td>
</tr>
<tr>
<td>VoiceOver</td>
<td>Chrome</td>
<td>OSX</td>
<td>DNA</td>
<td>Chrome and VoiceOver issues prevent MathML support in this combination.</td>
</tr>
<tr>
<td>VoiceOver</td>
<td>Firefox</td>
<td>OSX</td>
<td>DNA</td>
<td>Chrome and Firefox issues prevent MathML support in this combination.</td>
</tr>
<tr>
<td>Orca</td>
<td>Firefox</td>
<td>Ubuntu 15.10</td>
<td>+1</td>
<td>no bugs</td>
</tr>
<tr>
<td>Orca</td>
<td>Web</td>
<td>Ubuntu 15.10</td>
<td>DNA</td>
<td><a href="https://mail.gnome.org/archives/orca-list/2015-July/msg00010.html">Chrome issues prevent MathML support by ORCA</a></td>
</tr>
<tr>
<td>Orca</td>
<td>Chrome(ium)</td>
<td>Ubuntu 15.10</td>
<td>DNA</td>
<td><a href="https://mail.gnome.org/archives/orca-list/2015-July/msg00010.html">Chrome issues prevent MathML support by ORCA</a></td>
</tr>
</tbody>
</table></div>
<div class="section" id="notes-on-apple-voiceover">
<h3>Notes on Apple VoiceOver<a class="headerlink" href="#notes-on-apple-voiceover" title="Permalink to this headline">¶</a></h3>
<ul class="simple">
<li><strong>VoiceOver</strong> on OSX<ul>
<li><em>Safari</em>. The visually-hidden MathML is read out and gets an outline. Visual rendering is ignored correctly. VoiceOver somtimes drops parts of the equation due to its partial MathML support.</li>
<li><em>Chrome</em>. The visually-hidden MathML is detected but VoiceOver does not read it correctly (only e.g., “4 items detected; math”; this seems like a VO bug); an outline is added. Visual rendering is ignored correctly.</li>
<li><em>Firefox</em>. The visually-hidden MathML is only read as string of contained characters; an outline is added. Visual rendering is ignored correctly.</li>
</ul>
</li>
<li><strong>VoiceOver</strong> on iOS<ul>
<li>The “slide two fingers from top to read screen” method will read the visually-hidden MathML. Visual rendering is ignored correctly.</li>
<li>Manual exploration.<ul>
<li>Exploration by swiping left/right will read the visually-hidden MathML. Visual rendering is ignored correctly.</li>
<li>Tapping on an equation does not work due to the visually-hidden MathML being placed in a 1px box.</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
<div class="section" id="notes-on-mathplayer-4-and-internet-explorer-11">
<h3>Notes on MathPlayer 4 and Internet Explorer 11<a class="headerlink" href="#notes-on-mathplayer-4-and-internet-explorer-11" title="Permalink to this headline">¶</a></h3>
<p>Design Science suggests to always use IE’s Enterprise mode for MathPlayer in IE11, <a class="reference external" href="http://www.dessci.com/en/products/mathplayer/tech/default.htm#Enterprise_mode">see their documentation</a>.
However, it seems that this is only required for MathPlayer’s visual rendering
to work and this additionally requires the MathPlayer BrowserHelperAddon to be
active in IE.</p>
<p>Unfortunately, the MathPlayer BrowserHelperAddon can lead to crashes. E.g., if
you switch MathJax’s output to the NativeMML output, MathPlayer will crash IE 11; you’ll have to clear the MathJax cookie to reset things. Also, in a plain MathML sample (without MathJax), clicking on the MathPlayer rendering will crash
IE11.</p>
<p>Using IE’s Enterprise mode should work with NVDA and the AssistiveMML extension
but they don’t seem to work with NVDA and plain MathML pages.</p>
<p>We suggest you do not switch on IE’s Enterprise mode on pages using MathJax and
we also have to strongly suggest <strong>not</strong> to use the BrowserHelperAddon with MathJax
on IE 11.</p>
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