--- a/spec/xsd/ttaf1-dfxp-parameter-items.xsd	Fri May 29 04:12:36 2009 +0000
+++ b/spec/xsd/ttaf1-dfxp-parameter-items.xsd	Sun May 31 13:42:54 2009 +0000
@@ -3,6 +3,8 @@
   xmlns:tt="http://www.w3.org/2006/10/ttaf1"
   xmlns:ttd="http://www.w3.org/2006/10/ttaf1#datatype"
   xmlns:ttp="http://www.w3.org/2006/10/ttaf1#parameter">
+  <xs:import namespace="http://www.w3.org/XML/1998/namespace"
+    schemaLocation="xml.xsd"/>
   <xs:import namespace="http://www.w3.org/2006/10/ttaf1#datatype"
     schemaLocation="ttaf1-dfxp-datatypes.xsd"/>
   <xs:import namespace="http://www.w3.org/2006/10/ttaf1"