--- a/model/prov-constraints.html	Mon Sep 03 16:37:12 2012 +0100
+++ b/model/prov-constraints.html	Mon Sep 03 16:37:37 2012 +0100
@@ -779,7 +779,7 @@
 
 </section>
 
-<section id="typing">
+<section id="typing-section">
 <h2>Types</h2>
 
 <p> As set out in other specifications, the identifiers used in PROV