jonathanKingston
diff --git a/‎css-animations/Overview.bs‎
Lines changed: 17 additions & 11 deletions b/‎css-animations/Overview.bs‎
Lines changed: 17 additions & 11 deletions
@@ -134,8 +134,7 @@ Animations</h2>
 	immediately in the case of a pseudo style rule such as hover, or may be
 	when the scripting engine returns control to the browser (in the case of
 	style applied by script). Note that dynamically updating keyframe style
-	rules does not start or restart an animation.
-
+	rules does not start or re-start an animation.
 
 	An animation applies to an element if its name appears as one of the
 	identifiers in the computed value of the 'animation-name' property and the
@@ -149,6 +148,22 @@ Animations</h2>
 	Conversely, extending the 'animation-delay' may cause an animation to
 	re-start and dispatch an <a idl>animationstart</a> event.
 
+	The same @keyframes rule name may be repeated within an 'animation-name'.
+	Changes to the 'animation-name' update existing animations by iterating over
+	the new list of animations from last to first, and, for each animation,
+	finding the <em>last</em> matching animation in the list of existing
+	animations.
+	If a match is found, the existing animation is updated using the animation
+	properties corresponding to its position in the new list of animations,
+	whilst maintaining its current playback time as described above.
+	The matching animation is removed from the existing list of animations such
+	that it will not match twice.
+	If a match is not found, a new animation is created.
+	As a result, updating 'animation-name' from &lsquo;a&rsquo; to
+	&lsquo;a, a&rsquo; will cause the existing animation for &lsquo;a&rsquo; to
+	become the <em>second</em> animation in the list and a new animation will be
+	created for the first item in the list.
+
 	<div class='example'>
 		<pre>
 		div {
@@ -178,15 +193,6 @@ Animations</h2>
 
 	</div>
 
-	<p class="issue" id="issue-track-animation-state">
-	This specification should describe what information is part
-	of the state of running animations,
-	and how that information persists across changes to 'animation-name',
-	particularly when a name is repeated
-	within either the old or new value of 'animation-name'.
-	See <a href="https://lists.w3.org/Archives/Public/www-style/2016May/0111.html">www-style post</a> and other messages in the same thread.
-	</p>
-
 	Setting the 'display' property to ''display/none'' will terminate any running animation applied
 	to the element and its descendants. If an element has a 'display' of ''display/none'', updating
 	'display' to a value other than ''display/none'' will start all animations applied to the element