diff --git a/build/classes/xid/Presenter.class b/build/classes/xid/Presenter.class
index dfcf48f..5eff7e2 100644
Binary files a/build/classes/xid/Presenter.class and b/build/classes/xid/Presenter.class differ
diff --git a/build/classes/xid/TagsData.class b/build/classes/xid/TagsData.class
index 16fcd7f..d065714 100644
Binary files a/build/classes/xid/TagsData.class and b/build/classes/xid/TagsData.class differ
diff --git a/build_test/classes/xid/test/Test.class b/build_test/classes/xid/test/Test.class
index 36e80ef..1da341f 100644
Binary files a/build_test/classes/xid/test/Test.class and b/build_test/classes/xid/test/Test.class differ
diff --git a/dist/test.jar b/dist/test.jar
index 9a8e9db..54295a7 100644
Binary files a/dist/test.jar and b/dist/test.jar differ
diff --git a/dist/xid.jar b/dist/xid.jar
index 873386b..c759277 100644
Binary files a/dist/xid.jar and b/dist/xid.jar differ
diff --git a/src/xid/Presenter.java b/src/xid/Presenter.java
index b260daf..f3c0f22 100644
--- a/src/xid/Presenter.java
+++ b/src/xid/Presenter.java
@@ -296,6 +296,8 @@ public class Presenter
       {
 	int childrenCount = children.getLength ();
 	
+	// TODO Analyze IterationStragy if datas is a TagsData.
+
 	for (int i = 0; i < childrenCount; i++)
 	  {
 	    result.append (process (children.item(i), datas, webappPath, prefix, errorOutput));
@@ -525,9 +527,9 @@ public class Presenter
 	      }
 	  }
       }
-    else if (dataCore instanceof TagsData)
+    else if (dataCore instanceof TagsDataByIndex)
       {
-	TagsData tags = (TagsData) dataCore;
+	TagsDataByIndex tags = (TagsDataByIndex) dataCore;
 
 	int nbLines = tags.size ();
 	for (int nLine = 0; nLine < nbLines; nLine++)
diff --git a/src/xid/TagsData.java b/src/xid/TagsData.java
index 1191821..458523a 100644
--- a/src/xid/TagsData.java
+++ b/src/xid/TagsData.java
@@ -6,7 +6,7 @@ import java.io.*;
 /*
  *
  */
-public class TagsData extends Vector<TagDataCore> implements TagDataCore
+public class TagsData extends TagsDataById
 {
   /**
    *
@@ -15,4 +15,209 @@ public class TagsData extends Vector<TagDataCore> implements TagDataCore
   {
     super ();
   }
+
+
+  /**
+   *
+   */
+  public TagData getTagData (String id)
+  {
+    TagData result;
+
+    // Be sure that TagData is existing and get item.
+    result = (TagData) this.get (id);
+
+    if (result == null)
+      {
+	this.put (id, new TagData ());
+
+	result = (TagData) this.get (id);
+      }
+
+
+    //
+    return (result);
+  }
+
+
+  /**
+   *
+   */
+  public TagData getTagData (String id, int line)
+  {
+    TagData result;
+
+    // Be sure that TagsData are existing.
+    TagsDataByIndex tags = (TagsDataByIndex) this.get (id);
+    if (tags == null)
+      {
+	this.put (id, new TagsDataByIndex ());
+
+	tags = (TagsDataByIndex) this.get (id);
+      }
+
+    // Be sure that lines are existing.
+    int nbLines = tags.size ();
+    for (int nLine = nbLines; nLine < line + 1; nLine++)
+      {
+	tags.add (nLine, new TagData ());
+      }
+
+    // Get item.
+    result = (TagData) tags.elementAt (line);
+
+    //
+    return (result);
+  }
+
+
+  /**
+   *
+   */
+  public TagData getTagData (String id, int line, String column)
+  {
+    TagData result;
+
+    // Be sure that TagsData are existing.
+    TagsDataByIndex tags = (TagsDataByIndex) this.get (id);
+    if (tags == null)
+      {
+	this.put (id, new TagsDataByIndex ());
+	
+	tags = (TagsDataByIndex) this.get (id);
+      }
+
+    // Be sure that lines are existing.
+    int nbLines = tags.size ();
+    for (int nLine = nbLines; nLine < line + 1; nLine++)
+      {
+	tags.add (nLine, new TagsDataById ());
+      }
+
+    // Get item.
+    TagsDataById lineData = (TagsDataById) tags.elementAt (line);
+
+    result = (TagData) lineData.get (column);
+
+    if (result == null)
+      {
+	lineData.put (column, new TagData ());
+
+	result = (TagData) lineData.get (column);
+      }
+
+    //
+    return (result);
+  }
+
+
+  /**
+   *
+   */
+  public void setIterationStragey (String id, TagsDataByIndex.IterationStrategy strategy)
+  {
+    TagsDataByIndex tags = (TagsDataByIndex) this.get (id);
+
+    tags.setIterationStrategy (strategy);
+  }
+
+
+
+  /**
+   *
+   */
+  public void setContent (String id, String content)
+  {
+    TagData tag = this.getTagData (id);
+
+    tag.setContent (content);
+  }
+
+
+  /**
+   *
+   */
+  public void setContent (String id, int line, String content)
+  {
+    TagData tag = this.getTagData (id, line);
+    
+    tag.setContent (content);
+  }
+
+
+  /**
+   *
+   */
+  public void setContent (String id, int line, String column, String content)
+  {
+    TagData tag = this.getTagData (id, line, column);
+
+    tag.setContent (content);
+  }
+
+
+  /**
+   *
+   */
+  public void setAttribute (String id, String label, String value)
+  {
+    TagData tag = this.getTagData (id);
+
+    tag.getAttributes ().setAttribute (label, value);
+  }
+
+
+  /**
+   *
+   */
+  public void setAttribute (String id, int line, String label, String value)
+  {
+    TagData tag = this.getTagData (id, line);
+
+    tag.getAttributes ().setAttribute (label, value);
+  }
+
+
+  /**
+   *
+   */
+  public void setAttribute (String id, int line, String column, String label, String value)
+  {
+    TagData tag = this.getTagData (id, line, column);
+
+    tag.getAttributes ().setAttribute (label, value);
+  }
+
+
+  /**
+   *
+   */
+  public void appendAttribute (String id, String label, String value)
+  {
+    TagData tag = this.getTagData (id);
+
+    tag.getAttributes ().appendAttribute (label, value);
+  }
+
+
+  /**
+   *
+   */
+  public void appendContent (String id, int line, String label, String value)
+  {
+    TagData tag = this.getTagData (id, line);
+
+    tag.getAttributes ().appendAttribute (label, value);
+  }
+
+
+  /**
+   *
+   */
+  public void appendContent (String id, int line, String column, String label, String value)
+  {
+    TagData tag = this.getTagData (id, line, column);
+
+    tag.getAttributes ().appendAttribute (label, value);
+  }
 }
diff --git a/src/xid/TagsDataById.java b/src/xid/TagsDataById.java
index a763259..4af3708 100644
--- a/src/xid/TagsDataById.java
+++ b/src/xid/TagsDataById.java
@@ -8,7 +8,7 @@ import java.io.*;
  */
 public class TagsDataById extends HashMap<String, TagDataCore> implements TagDataCore
 {
-  /**
+  /*
    *
    */
   public TagsDataById ()
@@ -36,197 +36,4 @@ public class TagsDataById extends HashMap<String, TagDataCore> implements TagDat
     //
     return (result);
   }
-
-  /* ------------------- Helpers ------------ */
-  /**
-   *
-   */
-  public TagData getTagData (String id)
-  {
-    TagData result;
-
-    // Be sure that TagData is existing and get item.
-    result = (TagData) this.get (id);
-
-    if (result == null)
-      {
-	this.put (id, new TagData ());
-
-	result = (TagData) this.get (id);
-      }
-
-
-    //
-    return (result);
-  }
-
-
-  /**
-   *
-   */
-  public TagData getTagData (String id, int line)
-  {
-    TagData result;
-
-    // Be sure that TagsData are existing.
-    TagsData tags = (TagsData) this.get (id);
-    if (tags == null)
-      {
-	this.put (id, new TagsData ());
-
-	tags = (TagsData) this.get (id);
-      }
-
-    // Be sure that lines are existing.
-    int nbLines = tags.size ();
-    for (int nLine = nbLines; nLine < line + 1; nLine++)
-      {
-	tags.add (nLine, new TagData ());
-      }
-
-    // Get item.
-    result = (TagData) tags.elementAt (line);
-
-    //
-    return (result);
-  }
-
-
-  /**
-   *
-   */
-  public TagData getTagData (String id, int line, String column)
-  {
-    TagData result;
-
-    // Be sure that TagsData are existing.
-    TagsData tags = (TagsData) this.get (id);
-    if (tags == null)
-      {
-	this.put (id, new TagsData ());
-	
-	tags = (TagsData) this.get (id);
-      }
-
-    // Be sure that lines are existing.
-    int nbLines = tags.size ();
-    for (int nLine = nbLines; nLine < line + 1; nLine++)
-      {
-	tags.add (nLine, new TagsDataById ());
-      }
-
-    // Get item.
-    TagsDataById lineData = (TagsDataById) tags.elementAt (line);
-
-    result = (TagData) lineData.get (column);
-
-    if (result == null)
-      {
-	lineData.put (column, new TagData ());
-
-	result = (TagData) lineData.get (column);
-      }
-
-    //
-    return (result);
-  }
-
-
-  /**
-   *
-   */
-  public void setContent (String id, String content)
-  {
-    TagData tag = this.getTagData (id);
-
-    tag.setContent (content);
-  }
-
-
-  /**
-   *
-   */
-  public void setContent (String id, int line, String content)
-  {
-    TagData tag = this.getTagData (id, line);
-    
-    tag.setContent (content);
-  }
-
-
-  /**
-   *
-   */
-  public void setContent (String id, int line, String column, String content)
-  {
-    TagData tag = this.getTagData (id, line, column);
-
-    tag.setContent (content);
-  }
-
-
-  /**
-   *
-   */
-  public void setAttribute (String id, String label, String value)
-  {
-    TagData tag = this.getTagData (id);
-
-    tag.getAttributes ().setAttribute (label, value);
-  }
-
-
-  /**
-   *
-   */
-  public void setAttribute (String id, int line, String label, String value)
-  {
-    TagData tag = this.getTagData (id, line);
-
-    tag.getAttributes ().setAttribute (label, value);
-  }
-
-
-  /**
-   *
-   */
-  public void setAttribute (String id, int line, String column, String label, String value)
-  {
-    TagData tag = this.getTagData (id, line, column);
-
-    tag.getAttributes ().setAttribute (label, value);
-  }
-
-
-  /**
-   *
-   */
-  public void appendAttribute (String id, String label, String value)
-  {
-    TagData tag = this.getTagData (id);
-
-    tag.getAttributes ().appendAttribute (label, value);
-  }
-
-
-  /**
-   *
-   */
-  public void appendContent (String id, int line, String label, String value)
-  {
-    TagData tag = this.getTagData (id, line);
-
-    tag.getAttributes ().appendAttribute (label, value);
-  }
-
-
-  /**
-   *
-   */
-  public void appendContent (String id, int line, String column, String label, String value)
-  {
-    TagData tag = this.getTagData (id, line, column);
-
-    tag.getAttributes ().appendAttribute (label, value);
-  }
 }
diff --git a/test/xid/test/Test.java b/test/xid/test/Test.java
index 16aba38..00fa03d 100644
--- a/test/xid/test/Test.java
+++ b/test/xid/test/Test.java
@@ -47,7 +47,7 @@ class Test
     //test ();
 
     //
-    TagsDataById datas;
+    TagsData datas;
     TagData tag;
 
 
@@ -57,7 +57,7 @@ class Test
     StringBuffer errorMessage;
 
     // Populate attributes of Test 03.
-    datas = new TagsDataById ();
+    datas = new TagsData ();
     tag = new TagData ();
     tag.setContent ("Superman");
     datas.put ("name", tag);
@@ -66,7 +66,7 @@ class Test
     html = Presenter.doXid ("<div id='name'>a name</div >", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataById ();");
+    System.out.println ("datas = new TagsData ();");
     System.out.println ("tag = new TagData ();");
     System.out.println ("tag.setContent (\"Superman\");");
     System.out.println ("datas.put (\"name\", tag););");
@@ -77,14 +77,14 @@ class Test
 
 
     // Populate attributes of Test 03.
-    datas = new TagsDataById ();
+    datas = new TagsData ();
     datas.setContent ("name", "Superman");
 
     errorMessage = new StringBuffer ();
     html = Presenter.doXid ("<div id='name'>a name</div >", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataById ();");
+    System.out.println ("datas = new TagsData ();");
     System.out.println ("datas.setContent (\"name\", \"Superman\");");
     System.out.println ("+");
     System.out.println ("<div id='name'>a name</div >");
@@ -93,7 +93,7 @@ class Test
 
 
     // Populate attributes of Test 03.
-    datas = new TagsDataById ();
+    datas = new TagsData ();
     tag = new TagData ();
     tag.setContent ("Spiderman");
     tag.getAttributes ().appendAttribute ("style", "background: blue;");
@@ -106,7 +106,7 @@ class Test
     html = Presenter.doXid ("<div id='lastname'>a last name</div >", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataById ();");
+    System.out.println ("datas = new TagsData ();");
     System.out.println ("tag = new TagData ();");
     System.out.println ("tag.getAttributes ().setAttribute (\"class\", \"lastnameClass\");");
     System.out.println ("tag.getAttributes ().appendAttribute (\"style\", \"background: blue;\");");
@@ -120,7 +120,7 @@ class Test
 
 
     // Populate attributes of Test 03.
-    datas = new TagsDataById ();
+    datas = new TagsData ();
     datas.setContent ("lastname", "Spiderman");
     datas.appendAttribute ("lastname", "style", "background: blue;");
     datas.appendAttribute ("lastname", "style", "foreground: red;");
@@ -131,7 +131,7 @@ class Test
     html = Presenter.doXid ("<div id='lastname'>a last name</div >", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataById ();");
+    System.out.println ("datas = new TagsData ();");
     System.out.println ("datas.setContent (\"lastname\", \"Spiderman\");");
     System.out.println ("datas.appendAttribute (\"lastname\", \"style\", \"background: blue;\");");
     System.out.println ("datas.appendAttribute (\"lastname\", \"style\", \"foreground: red;\"");
@@ -143,7 +143,7 @@ class Test
 
 
     // Populate attributes of Test 03.
-    datas = new TagsDataById ();
+    datas = new TagsData ();
     datas.setContent ("words", 0, "alpha");
     datas.setContent ("words", 1, "bravo");
     datas.setContent ("words", 2, "charlie");
@@ -156,7 +156,7 @@ class Test
     html = Presenter.doXid ("<ul>\n  <li id='words'>a word</li>\n</ul>", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataById ();");
+    System.out.println ("datas = new TagsData ();");
     System.out.println ("datas.setContent (\"words\", 0, \"alpha\");");
     System.out.println ("datas.setContent (\"words\", 1, \"bravo\");");
     System.out.println ("datas.setContent (\"words\", 2, \"charlie\");");
@@ -172,7 +172,7 @@ class Test
 
 
     // Populate attributes of Test 03.
-    datas = new TagsDataById ();
+    datas = new TagsData ();
     datas.setContent ("identity", 0, "nom", "Jemba");
     datas.setContent ("identity", 0, "prenom", "Epo");
     datas.setContent ("identity", 1, "nom", "Momon");
@@ -185,7 +185,7 @@ class Test
     html = Presenter.doXid ("<table>\n  <tr id='identity'><td>noid</td><td id='nom'>un nom</td><td id='prenom'>un prenom</td></tr>\n</table>", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataById ();");
+    System.out.println ("datas = new TagsData ();");
     System.out.println ("datas.setContent (\"identity\", 0, \"nom\", \"Jemba\");");
     System.out.println ("datas.setContent (\"identity\", 0, \"prenom\", \"Epo\");");
     System.out.println ("datas.setContent (\"identity\", 1, \"nom\", \"Momon\");");
diff --git a/test/xid/test/Test.java~ b/test/xid/test/Test.java~
index 2d03921..16aba38 100644
--- a/test/xid/test/Test.java~
+++ b/test/xid/test/Test.java~
@@ -4,93 +4,11 @@ import java.util.*;
 import java.io.*;
 import xid.*;
 
-interface TTagDataCore
-{
-}
-
-class TTagData implements TTagDataCore
-{
-  public String a;
-}
-
-class TTagsDataById extends HashMap<String, Object> implements TTagDataCore
-{
-}
-
-class TTagsData extends Vector<Object> implements TTagDataCore
-{
-}
-
-class TTagsMatrix extends TTagsDataById
-{
-}
-
 /**
  *
  */
 class Test
 {
-
-  public static void test ()
-  {
-    System.out.println ("doing a test");
-
-
-    TTagsDataById tags = new TTagsDataById ();
-
-    TTagData tag = new TTagData ();
-    tag.a = "label a1";
-    tags.put ("id1", tag);
-
-    tag = new TTagData ();
-    tag.a = "label a2";
-    tags.put ("id2", tag);
-
-    TTagsData tag2 = new TTagsData ();
-    tags.put ("id3", tag2);
-
-    TTagsDataById tag3 = new TTagsDataById ();
-    tags.put ("id4", tag3);
-
-    TTagsMatrix tag4 = new TTagsMatrix ();
-    tags.put ("id5", tag4);
-
-    System.out.println ("tags=" + tags);
-
-    Set keys = tags.keySet ();
-    Iterator it = keys.iterator ();
-    while (it.hasNext ())
-      {
-	String key = (String) it.next ();
-	Object obj = tags.get (key);
-
-	StringBuffer comment = new StringBuffer ();
-	comment.append ("(" + key + "=> " + obj + "-> ");
-
-	if (obj instanceof TTagData)
-	  {
-	    comment.append ("class TTagData");
-	  }
-	else if (obj instanceof TTagsData)
-	  {
-	    comment.append ("class TTagsData");
-	  }
-	else if (obj instanceof TTagsDataById)
-	  {
-	    comment.append ("class TTagsDataById");
-	  }
-
-	if (obj instanceof TTagDataCore)
-	  {
-	    comment.append (" TTagDataCore");
-	  }
-
-	comment.append (")");	    
-	System.out.println (comment);
-    }
-  }
-
-
   static private org.apache.log4j.Logger log;
 
   static
@@ -148,7 +66,7 @@ class Test
     html = Presenter.doXid ("<div id='name'>a name</div >", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataId ();");
+    System.out.println ("datas = new TagsDataById ();");
     System.out.println ("tag = new TagData ();");
     System.out.println ("tag.setContent (\"Superman\");");
     System.out.println ("datas.put (\"name\", tag););");
@@ -166,7 +84,7 @@ class Test
     html = Presenter.doXid ("<div id='name'>a name</div >", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataId ();");
+    System.out.println ("datas = new TagsDataById ();");
     System.out.println ("datas.setContent (\"name\", \"Superman\");");
     System.out.println ("+");
     System.out.println ("<div id='name'>a name</div >");
@@ -188,7 +106,7 @@ class Test
     html = Presenter.doXid ("<div id='lastname'>a last name</div >", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataId ();");
+    System.out.println ("datas = new TagsDataById ();");
     System.out.println ("tag = new TagData ();");
     System.out.println ("tag.getAttributes ().setAttribute (\"class\", \"lastnameClass\");");
     System.out.println ("tag.getAttributes ().appendAttribute (\"style\", \"background: blue;\");");
@@ -213,9 +131,9 @@ class Test
     html = Presenter.doXid ("<div id='lastname'>a last name</div >", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataId ();");
+    System.out.println ("datas = new TagsDataById ();");
     System.out.println ("datas.setContent (\"lastname\", \"Spiderman\");");
-    System.out.println ("datas.appendAttribute (\"lastname\", \"style\", \"foreground: red;\");");
+    System.out.println ("datas.appendAttribute (\"lastname\", \"style\", \"background: blue;\");");
     System.out.println ("datas.appendAttribute (\"lastname\", \"style\", \"foreground: red;\"");
     System.out.println ("datas.setAttribute (\"lastname\", \"class\", \"nameClass\");");
     System.out.println ("+");
@@ -238,7 +156,7 @@ class Test
     html = Presenter.doXid ("<ul>\n  <li id='words'>a word</li>\n</ul>", datas, "", errorMessage);
     
     System.out.println ("----------------------------");
-    System.out.println ("datas = new TagsDataId ();");
+    System.out.println ("datas = new TagsDataById ();");
     System.out.println ("datas.setContent (\"words\", 0, \"alpha\");");
     System.out.println ("datas.setContent (\"words\", 1, \"bravo\");");
     System.out.println ("datas.setContent (\"words\", 2, \"charlie\");");
@@ -251,6 +169,34 @@ class Test
     System.out.println ("</ul>");
     System.out.println ("=>");
     System.out.println (html);
+
+
+    // Populate attributes of Test 03.
+    datas = new TagsDataById ();
+    datas.setContent ("identity", 0, "nom", "Jemba");
+    datas.setContent ("identity", 0, "prenom", "Epo");
+    datas.setContent ("identity", 1, "nom", "Momon");
+    datas.setContent ("identity", 1, "prenom", "Christian");
+    datas.setContent ("identity", 2, "nom", "Tronche");
+    datas.setContent ("identity", 2, "prenom", "Christophe");
+
+
+    errorMessage = new StringBuffer ();
+    html = Presenter.doXid ("<table>\n  <tr id='identity'><td>noid</td><td id='nom'>un nom</td><td id='prenom'>un prenom</td></tr>\n</table>", datas, "", errorMessage);
+    
     System.out.println ("----------------------------");
+    System.out.println ("datas = new TagsDataById ();");
+    System.out.println ("datas.setContent (\"identity\", 0, \"nom\", \"Jemba\");");
+    System.out.println ("datas.setContent (\"identity\", 0, \"prenom\", \"Epo\");");
+    System.out.println ("datas.setContent (\"identity\", 1, \"nom\", \"Momon\");");
+    System.out.println ("datas.setContent (\"identity\", 1, \"prenom\", \"Christian\");");
+    System.out.println ("datas.setContent (\"identity\", 2, \"nom\", \"Tronche\");");
+    System.out.println ("datas.setContent (\"identity\", 2, \"prenom\", \"Christophe\");");
+    System.out.println ("+");
+    System.out.println ("<table>");
+    System.out.println ("  <tr id='identity'><td id='nom'>un nom</td><td id='prenom'>un prenom</td></tr>");
+    System.out.println ("</table>");
+    System.out.println ("=>");
+    System.out.println (html);
   }
 }