diff --git a/src/fr/inrialpes/exmo/align/impl/renderer/RDFRendererVisitor.java b/src/fr/inrialpes/exmo/align/impl/renderer/RDFRendererVisitor.java
index 46e3302180a2c976137b525a27541f4171a4dbba..887e16d9bce40ac7c7028f1a859fecc82476fbe8 100644
--- a/src/fr/inrialpes/exmo/align/impl/renderer/RDFRendererVisitor.java
+++ b/src/fr/inrialpes/exmo/align/impl/renderer/RDFRendererVisitor.java
@@ -34,6 +34,7 @@ import org.semanticweb.owl.align.Cell;
 import org.semanticweb.owl.align.Relation;
 
 import fr.inrialpes.exmo.align.impl.Annotations;
+import fr.inrialpes.exmo.align.impl.Namespaces;
 import fr.inrialpes.exmo.align.impl.BasicAlignment;
 import fr.inrialpes.exmo.align.impl.ObjectCell;
 import fr.inrialpes.exmo.align.impl.BasicParameters;
@@ -86,7 +87,7 @@ public class RDFRendererVisitor 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");
@@ -108,7 +109,7 @@ public class RDFRendererVisitor 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+"'");
@@ -123,7 +124,7 @@ public class RDFRendererVisitor 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+"\"");
 	}