--- a/master/struct.html	Wed Sep 18 02:39:08 2013 -0400
+++ b/master/struct.html	Mon Sep 23 14:58:27 2013 +1000
@@ -2125,6 +2125,13 @@
   <dd>
     <p>The role value is a set of white-space separated machine-extractable semantic information used to define the purpose of the element.
     </p>
+    <p class="issue">The "Value" entry in the attribute definition box above should
+    be a grammar, not a sentence.  Maybe we can define a symbol &lt;role&gt; by
+    reference to the ARIA specification, and then define the attribute as taking
+    "role+".</p>
+    <p class="issue">The lacuna value is defined to be "default", but that's not
+    listed as one of the role names in the referenced ARIA section.  What does
+    "default" mean?</p>
   </dd>
 </dl>