--- a/data-cube/index.html	Sun Mar 17 14:54:34 2013 +0100
+++ b/data-cube/index.html	Mon Mar 18 09:15:44 2013 +0000
@@ -1316,7 +1316,7 @@
 ontology to define a containment hierarchy. This could be represented as a  <code><a>qb:HierarchicalCodeList</a></code> using the following.</p>
 
 <pre class="example">
-PREFIX spatial: &lt;http://data.ordnancesurvey.co.uk/ontology/spatialrelations/> .
+@prefix spatial: &lt;http://data.ordnancesurvey.co.uk/ontology/spatialrelations/> .
 
 eg:GBgeoHierarchy a qb:HierarchicalCodeList;
     rdfs:label "Geographic Hierarchy for Great Britain"@en;
@@ -1347,7 +1347,7 @@
   example:</p>
 
 <pre class="example">
-PREFIX spatial: &lt;http://data.ordnancesurvey.co.uk/ontology/spatialrelations/> .
+@prefix spatial: &lt;http://data.ordnancesurvey.co.uk/ontology/spatialrelations/> .
 
 eg:GBgeoHierarchy a qb:HierarchicalCodeList;
     qb:parentChildProperty  [owl:inverseOf spatial:within] .