Merge pull request #236 from w3c/pri-whofor

Add several items to abstract, general, and intro to techniques

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

@@ -126,15 +126,15 @@
 			<p>This document proposes a shared framework for presenting publication accessibility metadata in a
 				user-friendly manner, so as to offer the information to end users in a way that is easy for them to
 				understand (even for the less technical) and consistent across different publications and different
-				digital catalogs.</p>
+				digital catalogs. It it useful to point out that some of the metadata is useful for everybody. For example, many people want to make visual adjustments to make the reading experience more pleasurable.</p>
 		</section>
 		<section id="sotd"></section>
 		<section id="general-overview">
 			<h2>General overview</h2>
 
 			<p>This document helps those who wish to render accessibility metadata directly to users understand how to
 				represent machine-readable accessibility metadata in a user-friendly User Interface / User Experience
-				(UI/UX).</p>
+				(UI/UX). this document   targets implementers such as  book stores, retailers, distributers etc. Content creaters will benefit from reading these Principles, and are encouraged to follow <a href="https://www.w3.org/TR/epub-a11y-11/">EPUB Accessibility 1.1 Conformance and Discoverability Requirements section and its techniques.</a></p>
 
 			<div class="note">
 				<p>This document presents high-level principles without going into technical issues related to the
@@ -181,8 +181,9 @@ <h3>Metadata techniques</h3>
 		</section>
 		<section id="general-info">
 			<h2>General information (supplement the bibliographic information)</h2>
-			<p> The product details provide precious information about the usability of the book in relation to specific
-				user needs. The following informations should always be displayed:</p>
+			<p>To solve the problem of displaying the accessibility metadata in a human readable form, vendors will determine their correct statement to display (from the User Experience Guide) by parsing the metadata and using the appropriate Display Techniques document. </p>
+
+			<p>The product details provide precious information about the usability of the book in relation to specific user needs. The following informations should always be displayed:</p>
 
 			<ul>
 				<li> File format (EPUB, PDF, MP3, Audiobook, etc.) </li>