diff --git a/spec/shadow/autolink-config.js b/spec/shadow/autolink-config.js
index 82a8be09..c4534df4 100644
--- a/spec/shadow/autolink-config.js
+++ b/spec/shadow/autolink-config.js
@@ -29,6 +29,7 @@ var autolinkConfig = {
         'nodeType': '#dom-node-nodetype',
         'ownerDocument': '#dom-node-ownerdocument',
         'parent': '#concept-tree-parent',
+        'participate': '#concept-tree-participate',
         'participates': '#concept-tree-participate',
         'preceding': '#concept-tree-preceding',
         'range': '#range',
@@ -118,6 +119,9 @@ var autolinkConfig = {
 
     'http://www.w3.org/TR/CSS21/': {
         'CSS rules': 'syndata.html#rule-sets',
+        'inheritance': 'cascade.html#inheritance',
+        'box': 'box.html',
+        'formating structure': 'intro.html#formatting-structure',
         'text-decoration': 'text.html#lining-striking-props'
     },
 
diff --git a/spec/shadow/index.html b/spec/shadow/index.html
index 57b45f14..84a02b2a 100644
--- a/spec/shadow/index.html
+++ b/spec/shadow/index.html
@@ -226,9 +226,13 @@ <h3>Composed trees</h3>
           <figcaption>A composed tree</figcaption>
         </figure>
 
-        <p>In <dfn>rendering</dfn> a <a>document tree</a>, or presenting it visually, the <a>composed tree</a> <strong>must</strong> be used instead of the <a>document tree</a>.</p>
-
-        <p>The <a>composed tree</a> <strong>must</strong> be updated before the <a>rendering</a> occurs.</p>
+        <p>
+          If an element doesn't <a>participate</a> in a <a>composed tree</a> whose <a>root</a> node is a document, the element <strong>must</strong> not appear in the <a>formating structure</a> [[!CSS21]] nor create any CSS <a>box</a>.
+          This behavior <strong>must</strong> not be overridden by setting the 'display' property.
+        </p>
+        <p>
+          In resolving CSS <a>inheritance</a>, an element <strong>must</strong> inherit from the parent node in the <a>composed tree</a>, if applicable.
+        </p>
       </section>
 
     </section>