[css-cascade] Export more terms.

Author: tabatkins

css-cascade/Overview.bs

@@ -79,7 +79,7 @@ Importing Style Sheets: the ''@import'' rule</h2>
 
 	where the <<url>> or <<string>> gives the URL of the style sheet to be imported,
 	and the optional [<<supports-condition>>|<<declaration>>] and <<media-query-list>>
-	(collectively, the <dfn>import conditions</dfn>)
+	(collectively, the <dfn export>import conditions</dfn>)
 	state the conditions under which it applies.
 
 	<div class="example">
@@ -251,7 +251,7 @@ Shorthand Properties</h2>
 	that don't directly correspond to values of its <a>sub-properties</a>.
 	(In such cases, the <a>shorthand</a> will explicitly define the expansion of its values.)
 
-	In other cases, a property might be a <dfn>reset-only sub-property</dfn> of the shorthand:
+	In other cases, a property might be a <dfn export>reset-only sub-property</dfn> of the shorthand:
 	Like other <a>sub-properties</a>, it is reset to its initial value by the shorthand when unspecified,
 	but the shorthand might not include syntax to set the <a>sub-property</a>
 	to any of its other values.
@@ -731,7 +731,7 @@ Cascading</h2>
 			</ul>
 	</dl>
 
-	The <dfn>output of the cascade</dfn>
+	The <dfn export>output of the cascade</dfn>
 	is a (potentially empty) sorted list of <a>declared values</a> for each property on each element.