--- a/model/prov-constraints.html	Wed Nov 21 14:29:11 2012 +0000
+++ b/model/prov-constraints.html	Wed Nov 21 15:36:06 2012 +0000
@@ -1156,12 +1156,12 @@
 </section>
 
 <section id='rationale' class="informative">
-<h3>Rationale</h3>
+<h3>Rationale (Informative)</h3>
 <p> This section gives a high-level rationale that provides some
   further background for the constraints, but does not affect the
 technical content of the rest of the specification.</p>
 
-<section>
+<section class="informative">
 <h4>Entities, Activities and Agents</h4>
 <p>
 One of the central challenges in representing provenance information
@@ -1247,7 +1247,7 @@
 
 
 </section>
-<section>
+<section class="informative">
 <h4>Events</h4>
 
 <p> Although time is important for provenance, provenance can be used
@@ -1305,7 +1305,7 @@
 
 </section>
 
-<section id="typing-section">
+<section id="typing-section" class="informative">
 <h2>Types</h2>
 
 <p> As set out in other specifications, the identifiers used in PROV
@@ -1510,7 +1510,7 @@
     </div>
 
 </section>
-<section>
+<section class="informative">
 <h4>Validation Process Overview</h4>
 
 
@@ -2014,7 +2014,7 @@
 </p>
 </section>
 
-<section>
+<section class="informative">
 <h4>Summary of inferences and constraints</h4>
 
 <p><a href="">Table 2</a> summarizes the inferences, and