diff --git a/src/main/java/org/gcube/resourcemanagement/support/client/utils/CurrentStatus.java b/src/main/java/org/gcube/resourcemanagement/support/client/utils/CurrentStatus.java
index c983e72..76bb233 100644
--- a/src/main/java/org/gcube/resourcemanagement/support/client/utils/CurrentStatus.java
+++ b/src/main/java/org/gcube/resourcemanagement/support/client/utils/CurrentStatus.java
@@ -56,7 +56,6 @@ public final class CurrentStatus implements Serializable {
 			currentScope = scope.trim();
 		}
 		Resource_support.get().getEventBus().fireEvent(new SetScopeEvent(scope));
-		GWT.log("Set Scope event sent for " +  scope);
 		//Commands.setStatusScope(scope);
 	}
 
diff --git a/src/main/java/org/gcube/resourcemanagement/support/client/views/validators/SelectValidator.java b/src/main/java/org/gcube/resourcemanagement/support/client/views/validators/SelectValidator.java
new file mode 100644
index 0000000..fc204f4
--- /dev/null
+++ b/src/main/java/org/gcube/resourcemanagement/support/client/views/validators/SelectValidator.java
@@ -0,0 +1,39 @@
+/****************************************************************************
+ *  This software is part of the gCube Project.
+ *  Site: http://www.gcube-system.org/
+ ****************************************************************************
+ * The gCube/gCore software is licensed as Free Open Source software
+ * conveying to the EUPL (http://ec.europa.eu/idabc/eupl).
+ * The software and documentation is provided by its authors/distributors
+ * "as is" and no expressed or
+ * implied warranty is given for its use, quality or fitness for a
+ * particular case.
+ ****************************************************************************
+ * Filename: SelectValidator.java
+ ****************************************************************************
+ * @author <a href="mailto:daniele.strollo@isti.cnr.it">Daniele Strollo</a>
+ ***************************************************************************/
+
+package org.gcube.resourcemanagement.support.client.views.validators;
+
+import com.extjs.gxt.ui.client.widget.form.Field;
+import com.extjs.gxt.ui.client.widget.form.Validator;
+
+/**
+ * @author Daniele Strollo (ISTI-CNR)
+ *
+ */
+public class SelectValidator implements Validator {
+	private boolean emptyAllowed = false;
+
+	public SelectValidator(final boolean emptyAllowed) {
+		this.emptyAllowed = emptyAllowed;
+	}
+
+	public final String validate(final Field<?> field, final String value) {
+		if (!emptyAllowed && (value == null || value.trim().length() == 0)) {
+			return "The field value is invalid. Empty or null value not allowed.";
+		}
+		return null;
+	}
+}
diff --git a/src/main/java/org/gcube/resourcemanagement/support/client/views/validators/StringValidator.java b/src/main/java/org/gcube/resourcemanagement/support/client/views/validators/StringValidator.java
new file mode 100644
index 0000000..2d814c7
--- /dev/null
+++ b/src/main/java/org/gcube/resourcemanagement/support/client/views/validators/StringValidator.java
@@ -0,0 +1,46 @@
+/****************************************************************************
+ *  This software is part of the gCube Project.
+ *  Site: http://www.gcube-system.org/
+ ****************************************************************************
+ * The gCube/gCore software is licensed as Free Open Source software
+ * conveying to the EUPL (http://ec.europa.eu/idabc/eupl).
+ * The software and documentation is provided by its authors/distributors
+ * "as is" and no expressed or
+ * implied warranty is given for its use, quality or fitness for a
+ * particular case.
+ ****************************************************************************
+ * Filename: XMLValidator.java
+ ****************************************************************************
+ * @author <a href="mailto:daniele.strollo@isti.cnr.it">Daniele Strollo</a>
+ ***************************************************************************/
+
+package org.gcube.resourcemanagement.support.client.views.validators;
+
+import com.extjs.gxt.ui.client.widget.form.Field;
+import com.extjs.gxt.ui.client.widget.form.Validator;
+
+/**
+ * @author Daniele Strollo (ISTI-CNR)
+ *
+ */
+public class StringValidator implements Validator {
+	private int maxLenght = 256;
+	private boolean emptyAllowed = false;
+
+	public StringValidator(final int maxLenght, final boolean emptyAllowed) {
+		this.maxLenght = maxLenght;
+		this.emptyAllowed = emptyAllowed;
+	}
+
+	public final String validate(final Field<?> field, final String value) {
+		if (!emptyAllowed && (value == null || value.trim().length() == 0)) {
+			return "The field value is invalid. Empty or null value not allowed.";
+		}
+		if (value != null && value.length() > this.maxLenght) {
+			return "The value is too long. Limit of " + this.maxLenght + " chars exceeded.";
+		}
+		return null;
+	}
+}
+
+