--- a/ldp-ucr.html	Wed Sep 25 12:44:56 2013 -0500
+++ b/ldp-ucr.html	Thu Sep 26 09:54:33 2013 +0100
@@ -1106,6 +1106,7 @@
 		award without disturbing the information about the event.
 	</p>
 	<pre class='example'>
+@prefix : &lt;http://example.com/&gt;.
 @prefix sport: &lt;http://www.bbc.co.uk/ontologies/sport/&gt; .
 @prefix rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt; .
  
@@ -1119,6 +1120,7 @@
 		the winner of the gold medal by substituting the above description
 		with the following.</p>
 	<pre class='example'>
+@prefix : &lt;http://example.com/&gt;.
 @prefix sport: &lt;http://www.bbc.co.uk/ontologies/sport/&gt; .
 @prefix rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt; .
 @prefix foaf: &lt;http://xmlns.com/foaf/0.1/&gt; .
@@ -1142,9 +1144,9 @@
 		described by the following RDF model, based on the Data Catalog Vocabulary [[vocab-dcat]] which provides a standard format for representing the metadata held by organizations.
 	</p>
 	<pre class='example'>
+@prefix : &lt;http://example.com/&gt;.
 @prefix dcat: &lt;http://www.w3.org/ns/dcat#&gt; .
 @prefix dcterms: &lt;http://purl.org/dc/terms/&gt; .
-@prefix : <> .
    
  :catalog a dcat:Catalog ;
     dcat:dataset :dataset/001;