Merge pull request #430 from w3c/intro-key-information2

Added an introduction to key information

UX-Guide-Metadata/draft/principles/index.html

@@ -244,22 +244,42 @@ <h3>Why this information is important for accessibility</h3>
 		</section>
 		<section id="order-of-key-information">
 			<h2>Key accessibility information</h2>
-
+<!--
 			<div class="note">
 				<p>When the content creator does not provide any accessibility metadata for a publication, the three
 					pieces of key information that should always be present can still be shown (with an indication that
 					the information is missing): <a href="#visual-adjustments">Visual adjustments</a>, <a href="#supports-nonvisual-reading">Supports nonvisual reading</a>,
 						and <a href="#conformance-group"
 						>Conformance</a>.</p>
 			</div>
+-->
+<section id="intro-key-info" class="introductory">
+
+<h3>Introduction to key accessibility information</h3>
+<p>When focusing on the accessibility of a digital publication, three areas of key information come to mind:</p>
+<ul>
+<li>People who need to adjust the visual presentation want to know if they can enlarge the text, which is essential for low vision users. People with dyslexia must be able to select the font and adjust the foreground, background, and line length. People with low vision and dyslexia  represent the largest percentage of the print-disabled population.</li>
+<li>People who use a screen reader need to know if all the content in the title will be accessible to them. When images have text descriptions (alt text), they are assured that they will be not missing out on essential information. Blind users will greatly benefit from this information as well as individuals who use the read aloud feature in Reading Systems.</li>
+<li> People who are selecting materials for public institutions such as libraries or schools, need to know if the content conforms to accepted standards.</li>
+</ul>
+<p>This is why these guidelines recommend that three pieces of key information should always be displayed:</p>
+<ol>
+<li>Visual adjustments</li>
+<li>Supports nonvisual reading</li>
+<li>Conformance</li>
+</ol>
+<p>The other five areas provide details    about  specific features  or shortcomings in publications. It is expected that these other areas of key  information will give people   what they need to make an informed choice to read a particular title.</p>
+
 
 			<div class="note">
 				<p>This document does not define the order in which to show the key accessibility information; each
 					implementer can decide the preferred order for showing the accessibility information that
 					follows.</p>
 <p>In this document  are   examples of       important metadata  that is expected  to be in a wide range of publications. However, we do not have examples of all possible features that the metadata can express. The techniques have more values than are shown in the examples.
 </p>
+
 			</div>
+</section>
 			<section id="visual-adjustments">
 				<h3 data-localization-id="visual-adjustments-title">Visual adjustments</h3>