--- a/model/prov-constraints.html	Tue Nov 20 15:10:55 2012 +0000
+++ b/model/prov-constraints.html	Tue Nov 20 15:17:25 2012 +0000
@@ -1726,7 +1726,7 @@
 	</td>
 </tr>
 -->
-<tr><td style="border-width: 0px; "></td><td style="border-width: 0px; "></td><td style="border-width: 0px; "></td></tr>
+<tr><td style="border-width: 0px; "></td><td style="border-width: 0px; "></td></tr>
 
 <tr class="component6-color">
 	<td><a>Collection</a></td>
@@ -4522,7 +4522,7 @@
 <a title="equivalence">equivalence</a> of PROV documents and instances.  We first define these concepts
 for PROV instances and then extend them to PROV documents.</p>
 
-<section id="instance">
+<section id="instances">
   <h2>Instances</h2>
   
 <div class="remark">