Spacing - issue 51

w3c#51

guidelines/index.html

@@ -489,6 +489,13 @@ <h4>Images of Text (No Exception)</h4>
 					<p><a>Images of text</a> are only used for <a>pure decoration</a> or where a particular presentation of <a>text</a> is <a>essential</a> to the information being conveyed.</p>
 				</section>
 			</section>
+
+      <section class="sc">
+							<h4>Spacing</h4>
+						<p class="conformance-level">AA</p>
+							<p>Line spacing between paragraphs, blocks of text, graphics and embedded elements and objects and regions is at least 0.8em vertically and 0.5em horizontally and line spacing in cursive script languages have a line high of at least 150% unless a mechanism is available such that they can be increased up to 200% without loss of content or functionality.</p>
+						</section>
+
 		</section>
 
 		<section class="principle" id="operable">
@@ -1161,6 +1168,10 @@ <h1>Glossary</h1>
 				<dd>
 					<p>a sudden, unexpected situation or occurrence that requires immediate action to preserve health, safety, or property</p>
 				</dd>
+        <dt><dfn>em</dfn></dt>
+				<dd>
+					<p>one em unit is equal to the computed font-size for the element to which the em is applied.</p>
+				</dd>
 				<dt><dfn>essential</dfn></dt>
 				<dd>
 					<p>if removed, would fundamentally change the information or functionality of the content, <strong>and</strong> information and functionality cannot be achieved in another way that would conform</p>