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wcag.html
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<!DOCTYPE html>
<html lang="en-US">
<head>
<title>WCAG 2.0</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width"> <link href="css/training.css" rel="stylesheet" type="text/css">
</head>
<body><script> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-40224544-1', 'ncsu.edu'); ga('send', 'pageview'); </script><a href="#main" title="Skip to main content" class="skip-main">Skip To Main Content</a>
<h1>WCAG 2.0</h1>
<nav>
<p class="toc">
<label for="toc-menu" class="screen-reader">Table of Contents Menu</label> <select id="toc-menu">
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/">Table of Contents</option>
<optgroup label="The Nature of What is Required">
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/understand-nature.html">Overview</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/what-accessible-means.html">What Accessibility Means</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/law.html">Accessibility and the Law</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/ada.html">Americans with Disabilities Act</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/508.html">Section 508</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/wcag.html">WCAG 2</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/vpat.html">VPAT</option>
</optgroup>
<optgroup label="Choose a technology">
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/technology-overview.html">Overview</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/technology-html.html">HTML</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/technology-pdf.html">PDF</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/technology-office.html">Office Documents</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/technology-rich-media.html">Rich Media</option>
</optgroup>
<optgroup label="Some Basics">
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/basics-overview.html">Overview</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/language.html">Language</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/valid-code.html">Valid Code</option>
</optgroup>
<optgroup label="Document Structure">
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/headings.html">Headings</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/aria-landmarks.html">ARIA Landmarks</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/lists.html">Lists</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/tables.html">Tables</option>
</optgroup>
<optgroup label="User Interactions">
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/mouse-and-keyboard-events.html">Mouse and Keyboard Events</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/visual-focus.html">Visual Focus</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/menus.html">Menus</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/skip-to-main-content.html">Skip to Main Content Links</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/forms.html">Forms</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/color-contrast.html">Color Contrast</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/links.html">Links</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-new-window.html">Links Opening in New Windows</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-text-alt.html">Text or Alt Attribute for Links</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-internal.html">Internal Links</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-behavior.html">Link vs. Button</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-text-descriptive-target.html">Using Descriptive Link Text</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-text-length.html">Length of Link Text</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-text-unique.html">Unique Link Text</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-text-url.html">URL Text</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/link-underline.html">Underline Style for Links</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/find-content-multiple.html">Finding Content in Multiple Ways</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/timed-events.html">Timed Events</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/aria-checkbox.html">ARIA Checkbox Tutorial</option>
</optgroup>
<optgroup label="Conveying Through Alternate Senses">
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/alternative-text.html">Alternative Text</option>
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/captioning.html">Captioning</option>
</optgroup>
<optgroup label="Appendices">
<option value="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/testing-tools.html">Appendix A - Testing Tools</option>
</optgroup>
</select>
<input id="go-button" type="button" value="GO" onclick="location= document.getElementById('toc-menu').options[ document.getElementById('toc-menu').selectedIndex].value;">
</p>
<p class="prev"><a href="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/508.html"><img src="images/left-arrow.png" alt="previous" />Section 508</a></p>
<p class="next"><a href="http://accessibility.oit.ncsu.edu/training/accessibility-handbook/vpat.html">VPAT<img src="images/right-arrow.png" alt="next" /></a></p>
</nav><div id="main" role="main" tabindex="-1">
<p>The <a href="http://www.w3.org/TR/WCAG/">Web Content Accessibility Guidelines 2.0</a> (WCAG 2.0) are a set of standards defines by the W3C that define how to make Web content more accessible to people with disabilities. All of the accessibility work of the <a href="http://www.w3.org/">W3C</a> is housed under the <a href="http://www.w3.org/WAI/">Web Accessibility Initiative</a> (WAI). WCAG 2.0 defines four principles which provide the foundation for Web accessibility.</p>
<ul>
<li><strong>Perceivable</strong> - Information and user interface components must be presented to users in ways that they can perceive, regardless of the user’s functional impairment</li>
<li><strong>Operable</strong> - user interface components and navigation must be operable, regardless of the assistive technology used to interact with the interface</li>
<li><strong>Understandable</strong> - information and the operation of the user interface must be predictable and understandable to the user</li>
<li><strong>Robust</strong> - content must be robust enough to be able to be transformed and interpreted by a wide variety of user agents, like assistive technologies</li>
</ul>
<p>In addition to the principles there are a set of guidelines which expand the principles by delineating a set of goals content creators should have in making their content accessible. The guidelines are not themselves testable, but rather a set of “Success Criteria” are given that are testable. The Success Criteria have three different conformance levels - A, AA, and AAA, with AAA being the most accessible. Additionally there are “Sufficient and Advisory Techniques” that demonstrate coding techniques.</p>
<p>Further, there are a number of techniques and guidelines in addition to WCAG 2.0, such as how to make rich internet applications accessible (ARIA), how user agents like browsers should be made accessible, and more. All of this information is available from the <a href="http://www.w3.org/WAI/">Web Accessibility Initiative</a>. </p>
<p>The Web Content Accessibility Guidelines 2.0 (WCAG 2.0) is a rich and complex standard. Sometimes it can be difficult to understand all aspects of WCAG 2.0. This guide is largely based on the work surrounding WCAG 2.0, however, it presents it in a more approachable manner for those newer to Web accessibility. Additionally, some of the additional techniques in the ARIA suite are presented here too.</p>
</div></body>
</html>