diff --git a/src/fr/devinsy/xidyn/data/SimpleTagData.java b/src/fr/devinsy/xidyn/data/SimpleTagData.java
index 61c8aba..a0d553c 100644
--- a/src/fr/devinsy/xidyn/data/SimpleTagData.java
+++ b/src/fr/devinsy/xidyn/data/SimpleTagData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2017 Christian Pierre MOMON
+ * Copyright (C) 2006-2017,2020 Christian Pierre MOMON
  * 
  * This file is part of Xidyn.
  * 
@@ -36,6 +36,8 @@ import java.io.Serializable;
  */
 public class SimpleTagData implements Serializable, TagData
 {
+    private static final long serialVersionUID = 8976245034682639923L;
+
     public enum IterationStrategy
     {
         ONLY_FIRST_ROW,
@@ -50,9 +52,7 @@ public class SimpleTagData implements Serializable, TagData
         REPLACE,
         APPEND,
         IGNORE
-    }
-
-    private static final long serialVersionUID = 8976245034682639923L;;
+    };
 
     private IterationStrategy iterationStrategy;
     private TagAttributes attributes;
@@ -87,6 +87,19 @@ public class SimpleTagData implements Serializable, TagData
         this.iterationStrategy = IterationStrategy.ALL_ROWS;
     }
 
+    /**
+     * Append attribute.
+     *
+     * @param label
+     *            the label
+     * @param value
+     *            the value
+     */
+    public void appendAttribute(final String label, final String value)
+    {
+        this.attributes.appendAttribute(label, value);
+    }
+
     /**
      * Append content.
      * 
@@ -169,6 +182,23 @@ public class SimpleTagData implements Serializable, TagData
         return result;
     }
 
+    /**
+     * Gets the attribute.
+     *
+     * @param label
+     *            the label
+     * @return the attribute
+     */
+    public String getAttribute(final String label)
+    {
+        String result;
+
+        result = this.attributes.getAttribute(label);
+
+        //
+        return result;
+    }
+
     /**
      * Iteration strategy.
      * 
@@ -184,6 +214,19 @@ public class SimpleTagData implements Serializable, TagData
         return result;
     }
 
+    /**
+     * Sets the attribute.
+     *
+     * @param label
+     *            the label
+     * @param value
+     *            the value
+     */
+    public void setAttribute(final String label, final String value)
+    {
+        this.attributes.put(label, value);
+    }
+
     /**
      * Sets the content.
      * 
diff --git a/src/fr/devinsy/xidyn/data/TagDataManager.java b/src/fr/devinsy/xidyn/data/TagDataManager.java
index d1f6cde..81c5c64 100644
--- a/src/fr/devinsy/xidyn/data/TagDataManager.java
+++ b/src/fr/devinsy/xidyn/data/TagDataManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2017 Christian Pierre MOMON
+ * Copyright (C) 2006-2017,2020 Christian Pierre MOMON
  * 
  * This file is part of Xidyn.
  * 
@@ -74,6 +74,82 @@ public class TagDataManager
         tags.add(tag);
     }
 
+    /**
+     * Append attribute.
+     *
+     * @param id
+     *            the id
+     * @param line
+     *            the line
+     * @param label
+     *            the label
+     * @param value
+     *            the value
+     */
+    public void appendAttribute(final String id, final int line, final String label, final long value)
+    {
+        appendAttribute(id, line, label, String.valueOf(value));
+    }
+
+    /**
+     * Append attribute.
+     *
+     * @param id
+     *            the id
+     * @param line
+     *            the line
+     * @param label
+     *            the label
+     * @param value
+     *            the value
+     */
+    public void appendAttribute(final String id, final int line, final String label, final String value)
+    {
+        SimpleTagData tag = this.getIdData(id, line);
+
+        tag.attributes().appendAttribute(label, value);
+    }
+
+    /**
+     * Append attribute.
+     *
+     * @param id
+     *            the id
+     * @param line
+     *            the line
+     * @param column
+     *            the column
+     * @param label
+     *            the label
+     * @param value
+     *            the value
+     */
+    public void appendAttribute(final String id, final int line, final String column, final String label, final long value)
+    {
+        appendAttribute(id, line, column, label, String.valueOf(value));
+    }
+
+    /**
+     * Append attribute.
+     *
+     * @param id
+     *            the id
+     * @param line
+     *            the line
+     * @param column
+     *            the column
+     * @param label
+     *            the label
+     * @param value
+     *            the value
+     */
+    public void appendAttribute(final String id, final int line, final String column, final String label, final String value)
+    {
+        SimpleTagData tag = this.getIdData(id, line, column);
+
+        tag.attributes().appendAttribute(label, value);
+    }
+
     /**
      * Append attribute.
      * 
@@ -174,6 +250,19 @@ public class TagDataManager
         tag.appendContent(value);
     }
 
+    /**
+     * Append content.
+     *
+     * @param id
+     *            the id
+     * @param value
+     *            the value
+     */
+    public void appendContent(final String id, final long value)
+    {
+        appendContent(id, String.valueOf(value));
+    }
+
     /**
      * Append content.
      * 
@@ -297,11 +386,11 @@ public class TagDataManager
     }
 
     /**
-     * Gets the ids data by id.
-     * 
-     * @return the ids data by id
+     * Gets the root ids data.
+     *
+     * @return the root
      */
-    public TagDataListById getIdsDataById()
+    public TagDataListById getRoot()
     {
         TagDataListById result;
 
diff --git a/src/fr/devinsy/xidyn/presenters/DomPresenterCore.java b/src/fr/devinsy/xidyn/presenters/DomPresenterCore.java
index 20affa2..5ed6c7c 100644
--- a/src/fr/devinsy/xidyn/presenters/DomPresenterCore.java
+++ b/src/fr/devinsy/xidyn/presenters/DomPresenterCore.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2018 Christian Pierre MOMON
+ * Copyright (C) 2006-2018,2020 Christian Pierre MOMON
  * 
  * This file is part of Xidyn.
  * 
@@ -90,7 +90,7 @@ public class DomPresenterCore
      */
     public static void dynamize(final Appendable result, final Document doc, final TagDataManager data) throws XidynException
     {
-        dynamize(result, doc, data.getIdsDataById());
+        dynamize(result, doc, data.getRoot());
     }
 
     /**
@@ -131,7 +131,7 @@ public class DomPresenterCore
     {
         StringBuffer result;
 
-        result = dynamize(doc, data.getIdsDataById());
+        result = dynamize(doc, data.getRoot());
 
         //
         return result;
diff --git a/test/fr/devinsy/xidyn/data/TagDataManagerTest.java b/test/fr/devinsy/xidyn/data/TagDataManagerTest.java
new file mode 100644
index 0000000..3ea9c3f
--- /dev/null
+++ b/test/fr/devinsy/xidyn/data/TagDataManagerTest.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2020 Christian Pierre MOMON
+ * 
+ * This file is part of Xidyn.
+ * 
+ * Xidyn is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Xidyn is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Xidyn.  If not, see <http://www.gnu.org/licenses/>
+ */
+package fr.devinsy.xidyn.data;
+
+import org.fest.assertions.Assertions;
+import org.junit.Test;
+
+import fr.devinsy.xidyn.presenters.PresenterUtils;
+
+/**
+ * The Class TagDataManagerTest.
+ */
+public class TagDataManagerTest
+{
+    /**
+     * Test 01.
+     * 
+     * @throws Exception
+     *             the exception
+     */
+    @Test
+    public void test01() throws Exception
+    {
+        String source = "<ul><li id='line'>line 1</li></ul>";
+
+        TagDataManager data = new TagDataManager();
+        data.setContent("line", 0, "Alpha");
+        data.appendAttribute("line", 0, "style", "background: red;");
+        data.setContent("line", 1, "Bravo");
+        data.appendAttribute("line", 1, "style", "background: blue;");
+
+        String target = PresenterUtils.dynamize(source, data).toString();
+
+        String goal = "<ul><li style=\"background: red;\" id=\"line_0\">Alpha</li>\n<li style=\"background: blue;\" id=\"line_1\">Bravo</li>\n</ul>";
+
+        Assertions.assertThat(target).isEqualTo(goal);
+    }
+
+    @Test
+    public void test02() throws Exception
+    {
+        String source = "<table><tr id='line'><td id='col1'>id</td><td id='name'>name</td></tr></table>";
+
+        TagDataManager data = new TagDataManager();
+        data.setContent("line", 0, "col1", "Alpha");
+        data.appendAttribute("line", 0, "col1", "style", "background: red;");
+        data.setContent("line", 1, "Bravo");
+        data.appendAttribute("line", 1, "style", "background: blue;");
+
+        String target = PresenterUtils.dynamize(source, null).toString();
+
+        Assertions.assertThat(target).isEqualTo(source);
+    }
+}