Merge pull request #253 from w3c/pri-sequence

Changed the sequencquence and add unknown to nonvisual

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

@@ -238,8 +238,8 @@ <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="#supports-nonvisual-reading">Supports nonvisual reading</a>,
-						<a href="#visual-adjustments">Visual adjustments</a> and <a href="#conformance-group"
+					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>
 
@@ -347,6 +347,8 @@ <h4>Examples</h4>
 								electronic braille.</li>
 							<li>Not all of the content will be available in generated read aloud speech and electronic
 								braille.</li>
+<li>It is not known if thecontent will be available in generated read aloud speech and electronic
+								braille</li>
 						</ul>
 					</aside>
 
@@ -355,6 +357,7 @@ <h4>Examples</h4>
 							<li>Readable in read aloud and braille.</li>
 							<li>May not be fully readable in read aloud and braille.</li>
 							<li>Not fully readable in read aloud and braille.</li>
+<li>Not known ifReadable in read aloud and braille</li>
 						</ul>
 					</aside>
 				</section>