changed to platform:/plugin in XML Schema uri
diff --git a/bundles/org.eclipse.wst.xsd.ui/plugin.xml b/bundles/org.eclipse.wst.xsd.ui/plugin.xml
index 0dc7a77..963b1ac 100644
--- a/bundles/org.eclipse.wst.xsd.ui/plugin.xml
+++ b/bundles/org.eclipse.wst.xsd.ui/plugin.xml
@@ -200,7 +200,7 @@
 
     <extension point="org.eclipse.wst.xml.uriresolver.catalogContributor">
       <catalogContributor catalogId="default">
-        <mappingInfo key="http://www.w3.org/2001/XMLSchema" uri="platform:/resource/org.eclipse.xsd/cache/www.w3.org/2001/XMLSchema.xsd"/>
+        <mappingInfo key="http://www.w3.org/2001/XMLSchema" uri="platform:/plugin/org.eclipse.xsd/cache/www.w3.org/2001/XMLSchema.xsd"/>
       </catalogContributor>
     </extension>