diff --git a/src/fr/inrialpes/exmo/align/impl/renderer/HTMLMetadataRendererVisitor.java b/src/fr/inrialpes/exmo/align/impl/renderer/HTMLMetadataRendererVisitor.java
index 6a99e6735c456843cebb0f6472deec500d8a9aa5..7f4d8abdb12d264e26611d7b154f1c688a6705c2 100644
--- a/src/fr/inrialpes/exmo/align/impl/renderer/HTMLMetadataRendererVisitor.java
+++ b/src/fr/inrialpes/exmo/align/impl/renderer/HTMLMetadataRendererVisitor.java
@@ -32,6 +32,7 @@ import org.semanticweb.owl.align.AlignmentException;
 import org.semanticweb.owl.align.Parameters;
 
 import fr.inrialpes.exmo.align.impl.Annotations;
+import fr.inrialpes.exmo.align.impl.Namespace;
 import fr.inrialpes.exmo.align.impl.BasicParameters;
 import fr.inrialpes.exmo.align.impl.BasicAlignment;
 import fr.inrialpes.exmo.align.onto.LoadedOntology;
@@ -71,7 +72,7 @@ public class HTMLMetadataRendererVisitor implements AlignmentVisitor
     public void visit( Alignment align ) throws AlignmentException {
 	alignment = align;
 	nslist = new Hashtable<String,String>();
-	nslist.put(Annotations.ALIGNNS,"align");
+	nslist.put(Namespace.ALIGNMENT.uri,"align");
 	nslist.put("http://www.w3.org/1999/02/22-rdf-syntax-ns#","rdf");
 	nslist.put("http://www.w3.org/2001/XMLSchema#","xsd");
 	//nslist.put("http://www.omwg.org/TR/d7/ontology/alignment","omwg");
diff --git a/src/fr/inrialpes/exmo/align/impl/renderer/XMLMetadataRendererVisitor.java b/src/fr/inrialpes/exmo/align/impl/renderer/XMLMetadataRendererVisitor.java
index 851cc554cbfa79a9ff0cee6823fc3801639cde3f..6ae9aea600d4f00cf000c391bd7e8f52b2d1235b 100644
--- a/src/fr/inrialpes/exmo/align/impl/renderer/XMLMetadataRendererVisitor.java
+++ b/src/fr/inrialpes/exmo/align/impl/renderer/XMLMetadataRendererVisitor.java
@@ -31,6 +31,7 @@ import org.semanticweb.owl.align.AlignmentVisitor;
 import org.semanticweb.owl.align.Parameters;
 
 import fr.inrialpes.exmo.align.impl.Annotations;
+import fr.inrialpes.exmo.align.impl.Namespace;
 import fr.inrialpes.exmo.align.impl.BasicAlignment;
 import fr.inrialpes.exmo.align.impl.BasicParameters;
 
@@ -66,7 +67,7 @@ public class XMLMetadataRendererVisitor implements AlignmentVisitor {
 	String extensionString = "";
 	alignment = align;
 	nslist = new Hashtable<String,String>();
-	nslist.put(Annotations.ALIGNNS,"align");
+	nslist.put(Namespace.ALIGNMENT.uri,"align");
 	nslist.put("http://www.w3.org/1999/02/22-rdf-syntax-ns#","rdf");
 	nslist.put("http://www.w3.org/2001/XMLSchema#","xsd");
 	//nslist.put("http://www.omwg.org/TR/d7/ontology/alignment","omwg");
@@ -88,7 +89,7 @@ public class XMLMetadataRendererVisitor implements AlignmentVisitor {
 	    writer.print("<?xml version='1.0' encoding='utf-8");
 	    writer.print("' standalone='no'?>\n");
 	}
-	writer.print("<rdf:RDF xmlns='"+Annotations.ALIGNNS+"'");
+	writer.print("<rdf:RDF xmlns='"+Namespace.ALIGNMENT.uri+"'");
 	for ( Enumeration e = nslist.keys() ; e.hasMoreElements(); ) {
 	    String k = (String)e.nextElement();
 	    writer.print("\n         xmlns:"+nslist.get(k)+"='"+k+"'");
@@ -103,7 +104,7 @@ public class XMLMetadataRendererVisitor implements AlignmentVisitor {
 	}
 	writer.print(">\n");
 	writer.print("<Alignment");
-	String idext = align.getExtension( Annotations.ALIGNNS, Annotations.ID );
+	String idext = align.getExtension( Namespace.ALIGNMENT.uri, Annotations.ID );
 	if ( idext != null ) {
 	    writer.print(" rdf:about=\""+idext+"\"");
 	}