--- a/model/ProvenanceModel.html	Fri Dec 16 12:46:55 2011 +0000
+++ b/model/ProvenanceModel.html	Fri Dec 16 12:58:36 2011 +0000
@@ -1727,8 +1727,10 @@
 <span class="name">actedOnBehalfOf</span>
 <span class="name">(</span>
 <span class="optional"> <span class="nonterminal">identifier</span>,</span>
-<span class="nonterminal">agIdentifier</span>,
-<span class="nonterminal">agIdentifier</span>,
+<span class="nonterminal">agIdentifier</span>
+<span class="name">,</span>
+<span class="nonterminal">agIdentifier</span>
+<span class="name">,</span>
 <span class="optional"><span class="nonterminal">aIdentifier</span></span>
 <span class="nonterminal">optional-attribute-values</span>
 <span class="name">)</span>
@@ -3398,8 +3400,13 @@
 </section> 
 </section>
 
+    <section id="constraints"> 
+<h2>PROV-DM Constraints</h2>
+
+<p>The previous two sections have introduced a data model for provenance, without introducing any constraint that this data model has to satisfy.  In this section, we explore the constraints that this data model has to satisfy. </p> 
+
     <section id="interpretation"> 
-<h2>PROV-DM Interpretation</h2>
+<h3>PROV-DM Interpretation</h3>
 
 <p>Section <a href="#section-time-event">section-time-event</a>
 introduced a notion of <a title="event">instantaneous event</a>
@@ -3544,6 +3551,19 @@
 
 </section>
 
+<section id="account-constraints"> 
+<h3>PROV-DM Account Constraints</h3>
+
+<div class="note">
+This section is in development and will group constraints associated with accounts here.
+</div>
+
+</section>
+
+
+
+</section>
+
     <section id="extensibility-section"> 
 <h2>PROV-DM Extensibility Points</h2>