diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/function/aggregate/TdAggregateFunction.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/function/aggregate/TdAggregateFunction.java
new file mode 100644
index 0000000..5a9f5d5
--- /dev/null
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/function/aggregate/TdAggregateFunction.java
@@ -0,0 +1,31 @@
+package org.gcube.portlets.user.td.gwtservice.shared.function.aggregate;
+
+
+/**
+ * 
+ * @author "Giancarlo Panichi" email: <a
+ *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
+ * 
+ */
+public class TdAggregateFunction extends TdBaseComboDataBean {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 2341132987652197369L;
+
+	/**
+	 * 
+	 */
+	public TdAggregateFunction() {
+	}
+
+	/**
+	 * @param id
+	 * @param label
+	 */
+	public TdAggregateFunction(String id, String label) {
+		super(id, label);
+	}
+
+}
diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/function/aggregate/TdBaseComboDataBean.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/function/aggregate/TdBaseComboDataBean.java
new file mode 100644
index 0000000..9319417
--- /dev/null
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/function/aggregate/TdBaseComboDataBean.java
@@ -0,0 +1,62 @@
+package org.gcube.portlets.user.td.gwtservice.shared.function.aggregate;
+
+import java.io.Serializable;
+
+/**
+ * 
+ * @author "Giancarlo Panichi"
+ * email: <a href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a> 
+ *
+ */
+public class TdBaseComboDataBean implements Serializable {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 5022327067102919324L;
+
+	private String id;
+	private String label;
+
+	/**
+	 * 
+	 */
+	public TdBaseComboDataBean() {
+	}
+
+	/**
+	 * @param id
+	 * @param label
+	 */
+	public TdBaseComboDataBean(String id, String label) {
+		this.id = id;
+		this.label = label;
+	}
+
+	public String getId() {
+		return id;
+	}
+
+	public String label() {
+		return label;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public void setLabel(String label) {
+		this.label = label;
+	}
+
+	@Override
+	public String toString() {
+		StringBuilder builder = new StringBuilder();
+		builder.append("TdDataBean [id=");
+		builder.append(id);
+		builder.append(", label=");
+		builder.append(label);
+		builder.append("]");
+		return builder.toString();
+	}
+}