diff --git a/demo/Demo.java b/demo/Demo.java
index 4d43a2f..f18e85e 100644
--- a/demo/Demo.java
+++ b/demo/Demo.java
@@ -174,7 +174,7 @@ class Demo
     source = new StringBuffer ();
     source.append ("<table>\n");
     source.append ("  <tr id='identity'><td>noid</td><td id='nom'>un nom</td><td id='prenom'>un prenom</td></tr>\n");
-    source.append ("  <tr id='identity2'><td>noid</td><td id='nom2'>un nom</td><td id='prenom2'>un prenom</td></tr>\n");
+    source.append ("  <tr id='identityBis'><td>noid</td><td id='nom2'>un nom</td><td id='prenom2'>un prenom</td></tr>\n");
     source.append ("  <tr><td>noid</td><td id='nom3'>un nom</td><td id='prenom3'>un prenom</td></tr>\n");
     source.append ("</table>");
     htmlSource = source.toString ();
diff --git a/demo/Demo.java~ b/demo/Demo.java~
index de01306..4d43a2f 100644
--- a/demo/Demo.java~
+++ b/demo/Demo.java~
@@ -60,7 +60,7 @@ class Demo
     datas.setContent ("name", "Superman");
 
     errorMessage = new StringBuffer ();
-    html = Presenter.doXid ("<div id='name'>a name</div >", datas, "", errorMessage);
+    html = Presenter.doXid ("<div id='name'>a name</div >", datas, errorMessage);
     
     System.out.println ("datas = new Data ();");
     System.out.println ("datas.setContent (\"name\", \"Superman\");");
@@ -80,7 +80,7 @@ class Demo
 
 
     errorMessage = new StringBuffer ();
-    html = Presenter.doXid ("<div id='lastname'>a last name</div >", datas, "", errorMessage);
+    html = Presenter.doXid ("<div id='lastname'>a last name</div >", datas, errorMessage);
     
     System.out.println ("datas = new Data ();");
     System.out.println ("datas.setContent (\"lastname\", \"Spiderman\");");
@@ -105,7 +105,7 @@ class Demo
 
 
     errorMessage = new StringBuffer ();
-    html = Presenter.doXid ("<ul>\n  <li id='words'>a word</li>\n</ul>", datas, "", errorMessage);
+    html = Presenter.doXid ("<ul>\n  <li id='words'>a word</li>\n</ul>", datas, errorMessage);
     
     System.out.println ("datas = new Data ();");
     System.out.println ("datas.setContent (\"words\", 0, \"alpha\");");
@@ -139,7 +139,7 @@ class Demo
     source.append (" <tr id='identity'><td>noid</td><td id='nom'>un nom</td><td id='prenom'>un prenom</td></tr>\n");
     source.append ("</table>");
     htmlSource = source.toString ();
-    html = Presenter.doXid (htmlSource, datas, "", errorMessage);
+    html = Presenter.doXid (htmlSource, datas, errorMessage);
     
     System.out.println ("datas = new Data ();");
     System.out.println ("datas.setContent (\"identity\", 0, \"nom\", \"Jemba\");");
@@ -194,22 +194,22 @@ class Demo
     
     datas.setIterationStrategy ("identity", IdsDataByIndex.IterationStrategy.ONLY_FIRST_ROW);
     System.out.println ("ONLY_FIRST_ROW:");
-    html = Presenter.doXid (htmlSource, datas, "", errorMessage);
+    html = Presenter.doXid (htmlSource, datas, errorMessage);
     System.out.println (html);
 
     datas.setIterationStrategy ("identity", IdsDataByIndex.IterationStrategy.ONLY_ROWS_WITH_ID);
     System.out.println ("ONLY_ROWS_WITH_ID:");
-    html = Presenter.doXid (htmlSource, datas, "", errorMessage);
+    html = Presenter.doXid (htmlSource, datas, errorMessage);
     System.out.println (html);
 
     datas.setIterationStrategy ("identity", IdsDataByIndex.IterationStrategy.ONLY_ROWS_WITHOUT_ID);
     System.out.println ("ONLY_ROWS_WITHOUT_ID:");
-    html = Presenter.doXid (htmlSource, datas, "", errorMessage);
+    html = Presenter.doXid (htmlSource, datas, errorMessage);
     System.out.println (html);
 
     datas.setIterationStrategy ("identity", IdsDataByIndex.IterationStrategy.ALL_ROWS);
     System.out.println ("ALL_ROWS:");
-    html = Presenter.doXid (htmlSource, datas, "", errorMessage);
+    html = Presenter.doXid (htmlSource, datas, errorMessage);
     System.out.println (html);
 
 
@@ -230,7 +230,7 @@ class Demo
     source.append ("  <h1>three</h1>\n");
     source.append ("</div>");
     htmlSource = source.toString ();
-    html = Presenter.doXid (htmlSource, datas, "", errorMessage);
+    html = Presenter.doXid (htmlSource, datas, errorMessage);
     
     System.out.println (htmlSource);
     System.out.println ("+");