--- a/model/prov-constraints.html	Tue Nov 20 23:48:21 2012 +0000
+++ b/model/prov-constraints.html	Tue Nov 20 23:50:39 2012 +0000
@@ -996,7 +996,7 @@
  <h4>Constants, Variables and Placeholders</h4>
   <p>
   PROV statements involve identifiers, literals, 
-  placeholders, and attribute lists.  Identifiers are, according to PROV-N, expressed as <a href="http://www.w3.org/TR/prov-n/#prod-QUALIFIED_NAME">qualified names</a> which can be mapped to URIs [[!IRI]].
+  placeholders, and attribute lists.  Identifiers are, according to PROV-N, expressed as <a href="http://www.w3.org/TR/prov-n/#prod-QUALIFIED_NAME">qualified names</a> which can be mapped to URIs [[!RFC3987]].
   However, in order to specify
   constraints over PROV instances, we also need <em>variables</em>
   that represent unknown identifiers, literals, or placeholders.