diff --git a/html/tutorial/refalign.rdf b/html/tutorial/refalign.rdf
index 52513b5e0eba02f9511a9d805d3b8dd86bf94d7e..624fcbd09254f4cc8f776ca6a50602b09fc1ae66 100644
--- a/html/tutorial/refalign.rdf
+++ b/html/tutorial/refalign.rdf
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='utf-8' standalone='no'?>
-<rdf:RDF xmlns='http://knowledgeweb.semanticweb.org/heterogeneity/alignment'
-         xml:base='http://knowledgeweb.semanticweb.org/heterogeneity/alignment'
+<rdf:RDF xmlns='http://knowledgeweb.semanticweb.org/heterogeneity/alignment#'
+         xml:base='http://knowledgeweb.semanticweb.org/heterogeneity/alignment#'
          xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'
          xmlns:xsd='http://www.w3.org/2001/XMLSchema#'>
 <Alignment>