diff --git a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/cellrepeater/CellRepeater.java b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/cellrepeater/CellRepeater.java
index 4fd2485..b9a0ca3 100644
--- a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/cellrepeater/CellRepeater.java
+++ b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/cellrepeater/CellRepeater.java
@@ -399,7 +399,7 @@ public class CellRepeater
      *
      * <p>&nbsp;&nbsp;&nbsp;&nbsp;<code>&lt;netui-data:cellRepeater dataSource="pageFlow.myIterativeData"></code>
      * @jsptagref.attributesyntaxvalue <i>expression_datasource</i>
-     * @netui:attribute required="true"
+     * @netui:attribute required="true" rtexprvalue="true"
      */
     public void setDataSource(String dataSource) {
         _dataSource = dataSource;
diff --git a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/datagrid/DataGrid.java b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/datagrid/DataGrid.java
index e23a2d1..083b971 100644
--- a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/datagrid/DataGrid.java
+++ b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/datagrid/DataGrid.java
@@ -327,7 +327,7 @@ public class DataGrid
      * This expression will be evaluated the data grid in order to obtain a reference to the data set.
      * </p>
      * @jsptagref.attributesyntaxvalue <i>string_dataSource</i>
-     * @netui:attribute required="true"
+     * @netui:attribute required="true" rtexprvalue="true"
      *                  description="The <code>dataSource</code> attribute determines both
      *                               the source of populating data for the tag and the object to which the tag submits data."
      */
diff --git a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/repeater/Repeater.java b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/repeater/Repeater.java
index 88eef2f..33472a8 100644
--- a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/repeater/Repeater.java
+++ b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/databinding/repeater/Repeater.java
@@ -725,7 +725,7 @@ public class Repeater
      *
      * <p>&nbsp;&nbsp;&nbsp;&nbsp;<code>&lt;netui-data:repeater dataSource="pageFlow.myIterativeData"></code>
      * @jsptagref.attributesyntaxvalue <i>expression_datasource</i>
-     * @netui:attribute required="true"
+     * @netui:attribute required="true" rtexprvalue="true"
      */
     public void setDataSource(String dataSource) {
         _dataSource = dataSource;
diff --git a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/divpanel/DivPanel.java b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/divpanel/DivPanel.java
index c0b91f1..306968d 100644
--- a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/divpanel/DivPanel.java
+++ b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/divpanel/DivPanel.java
@@ -82,7 +82,7 @@ public class DivPanel extends AbstractClassicTag
      * @jsptagref.attributedescription An expression which identifies which DivPanelState object will store state between posts to the server.
      * @jsptagref.databindable true
      * @jsptagref.attributesyntaxvalue <i>expression</i>
-     * @netui:attribute description="Sets an expression which indentifies the DivPanelState storing the state of the
+     * @netui:attribute rtexprvalue="true" description="Sets an expression which indentifies the DivPanelState storing the state of the
      * DivPanel between posts."
      */
     public void setDataSource(String dataSource)
diff --git a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/html/HtmlGroupBaseTag.java b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/html/HtmlGroupBaseTag.java
index e335e0d..32b775a 100644
--- a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/html/HtmlGroupBaseTag.java
+++ b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/html/HtmlGroupBaseTag.java
@@ -326,7 +326,7 @@ abstract public class HtmlGroupBaseTag
      * the source of populating data for the tag
      * @jsptagref.databindable false
      * @jsptagref.attributesyntaxvalue <i>string_dataSource</i>
-     * @netui:attribute required="true"
+     * @netui:attribute required="true" rtexprvalue="true"
      * description="Sets the tag's data source."
      */
     public void setDataSource(String dataSource)
diff --git a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/tree/Tree.java b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/tree/Tree.java
index d8e1a40..19fed9f 100644
--- a/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/tree/Tree.java
+++ b/beehive-netui-tags/src/main/java/org/apache/beehive/netui/tags/tree/Tree.java
@@ -671,7 +671,7 @@ public class Tree extends AbstractSimpleTag implements HtmlConstants,
      * that represents the root of the tree.
      * @jsptagref.databindable true
      * @jsptagref.attributesyntaxvalue <i>string_dataSource</i>
-     * @netui:attribute required="true"
+     * @netui:attribute required="true" rtexprvalue="true"
      * description="Sets an expression which indentifies the TreeElement that represents the root of
      * the tree."
      */