--- a/model/working-copy/prov-dm-constraints.html	Mon Feb 13 22:17:34 2012 +0000
+++ b/model/working-copy/prov-dm-constraints.html	Mon Feb 13 22:21:40 2012 +0000
@@ -251,15 +251,12 @@
 
 
 <section id='preliminaries'>
-<h2>Preliminaries</h2>
-
-    <section id='conceptualization'> 
-<h3>A Conceptualization of the World</h3>
+<h2>Data Model Refinement</h2>
 
 
     <section id='section-attributes'> 
 <h4>Attributes</h4>
-</section>
+
 
     <section id='section-entity-activity-agent'> 
 <h4>Entity, Activity, Agent</h4>
@@ -330,6 +327,7 @@
 <p> In this specification, the qualifier 'identifiable' is implicit whenever a reference is made to an activity, agent, or an entity.</p>
 
 </section>
+</section>
 
 
     <section id='section-time-event'> 
@@ -429,7 +427,6 @@
 <div class='issue'> We need to refine the definition of entity and activity, and all the concepts in general. This is <a href="http://www.w3.org/2011/prov/track/issues/223">ISSUE-223</a>.</div>
     </section> 
 
-    </section> 
 
 
     <section id="representation-record-assertion-inference"> 
@@ -769,7 +766,7 @@
 
 <section id="record-responsibility">
 
-<h4>Responsibility</h4>
+<h4>Responsibility Chain</h4>
 
 
 Nothing here.