diff --git a/application/controllers/system/TestUDF.php b/application/controllers/system/TestUDF.php
index 087d916b6..08ad72e1b 100644
--- a/application/controllers/system/TestUDF.php
+++ b/application/controllers/system/TestUDF.php
@@ -17,12 +17,7 @@ class TestUDF extends VileSci_Controller
 	 */
 	public function index()
 	{
-		$data = array (
-			'schema' => 'public',
-			'table' => 'tbl_person',
-			'field' => 'schuhgroesse',
-			'selected' => array(1, 2)
-		);
+		$data = array();
 		
 		$this->load->view('system/testudf', $data);
 	}
diff --git a/application/libraries/WidgetLib.php b/application/libraries/WidgetLib.php
index 15c90cfbd..bb4a46566 100644
--- a/application/libraries/WidgetLib.php
+++ b/application/libraries/WidgetLib.php
@@ -853,12 +853,12 @@ class DropdownWidget extends Widget
 	protected function addElementAtBeginning($elements, $stdDescription, $noDataDescription, $id)
 	{
 		$element = new stdClass();
-		$element->id = $id;
-		$element->description = $stdDescription;
+		$element->{DropdownWidget::ID_FIELD} = $id;
+		$element->{DropdownWidget::DESCRIPTION_FIELD} = $stdDescription;
 		
 		if (!hasData($elements))
 		{
-			$element->description = $noDataDescription;
+			$element->{DropdownWidget::DESCRIPTION_FIELD} = $noDataDescription;
 		}
 		
 		array_unshift($elements->retval, $element);
@@ -888,13 +888,35 @@ class DropdownWidgetUDF extends DropdownWidget
 		$tmpElements = array();
 		
 		// 
-		foreach($parameters as $key => $val)
+		foreach($parameters as $parameter)
 		{
-			$element = new stdClass();
-			$element->id = $key;
-			$element->description = $val;
-			
-			array_push($tmpElements, $element);
+			// 
+			if ((is_array($parameter) && count($parameter) == 2)
+				|| (is_string($parameter) || is_numeric($parameter))
+				|| (is_object($parameter) && isset($parameter->{PARENT::ID_FIELD}) && isset($parameter->{PARENT::DESCRIPTION_FIELD})))
+			{
+				$element = new stdClass(); // 
+				// 
+				if (is_array($parameter) && count($parameter) == 2)
+				{
+					$element->{PARENT::ID_FIELD} = $parameter[0]; // 
+					$element->{PARENT::DESCRIPTION_FIELD} = $parameter[1]; // 
+				}
+				// 
+				else if (is_string($parameter) || is_numeric($parameter))
+				{
+					$element->{PARENT::ID_FIELD} = $parameter; // 
+					$element->{PARENT::DESCRIPTION_FIELD} = $parameter; // 
+				}
+				// 
+				else if (is_object($parameter) && isset($parameter->{PARENT::ID_FIELD}) && isset($parameter->{PARENT::DESCRIPTION_FIELD}))
+				{
+					$element->{PARENT::ID_FIELD} = $parameter->{PARENT::ID_FIELD}; // 
+					$element->{PARENT::DESCRIPTION_FIELD} = $parameter->{PARENT::DESCRIPTION_FIELD}; // 
+				}
+				
+				array_push($tmpElements, $element); // 
+			}
 		}
 		
 		$this->setElementsArray(
@@ -924,7 +946,7 @@ class TextareaWidget extends Widget
 	 */
 	protected function setText($text)
 	{
-		$this->_args[DropdownWidget::TEXT] = $text;
+		$this->_args[TextareaWidget::TEXT] = $text;
 	}
 	
 	/**
@@ -946,7 +968,14 @@ class TextareaWidgetUDF extends TextareaWidget
 	 */
 	public function render($parameters)
 	{
-		$this->setText($parameters);
+		if ($parameters != null)
+		{
+			$this->setText($parameters);
+		}
+		else
+		{
+			$this->setText('');
+		}
 		
 		$this->loadTextareaView();
 		
@@ -954,6 +983,147 @@ class TextareaWidgetUDF extends TextareaWidget
     }
 }
 
+/**
+ * It exends the Widget class to represent an HTML textarea
+ */
+class TextfieldWidget extends Widget
+{
+	const VALUE = 'text'; // 
+	const SIZE = 'size'; // 
+	
+	/**
+	 * 
+	 */
+	protected function setValue($value)
+	{
+		$this->_args[TextfieldWidget::VALUE] = $value;
+	}
+	
+	/**
+	 * 
+	 */
+	protected function loadTextfieldView()
+	{
+		$this->view('widgets/textfield', $this->_args);
+	}
+}
+
+/**
+ * 
+ */
+class TextfieldWidgetUDF extends TextfieldWidget
+{
+	/**
+	 * 
+	 */
+	public function render($parameters)
+	{
+		if ($parameters != null)
+		{
+			$this->setValue($parameters);
+		}
+		else
+		{
+			$this->setValue('');
+		}
+		
+		$this->loadTextfieldView();
+		
+		echo $this->content();
+    }
+}
+
+/**
+ * It exends the Widget class to represent an HTML dropdown
+ */
+class CheckboxWidget extends Widget
+{
+	// The name of the element of the data array given to the view
+	// this element is an array of elements to be place inside the dropdown
+	const WIDGET_DATA_VALUES_ARRAY_NAME = 'VALUES_ARRAY';
+	// The name of the element of the data array given to the view
+	// this element is used to tell what element of the dropdown is selected
+	const CHECKED_VALUE = 'checkedValue';
+	
+	/**
+	 * 
+	 */
+	public function __construct($name, $args, $htmlArgs = array())
+	{
+		parent::__construct($name, $args, $htmlArgs);
+		
+		// 
+		if (!isset($this->_args[CheckboxWidget::CHECKED_VALUE]))
+		{
+			$this->_args[CheckboxWidget::CHECKED_VALUE] = Widget::HTML_DEFAULT_VALUE;
+		}
+	}
+
+	/**
+	 * 
+	 */
+	protected function setValuesArray($values)
+	{
+		if (isError($values))
+		{
+			if (is_object($values) && isset($values->retval))
+			{
+				show_error($values->retval);
+			}
+			else if (is_string($values))
+			{
+				show_error($values);
+			}
+			else
+			{
+				show_error('Generic error occurred');
+			}
+		}
+		else
+		{
+			$this->_args[CheckboxWidget::WIDGET_DATA_VALUES_ARRAY_NAME] = $values->retval;
+		}
+	}
+	
+	/**
+	 * 
+	 */
+	protected function loadCheckboxView()
+	{
+		$this->view('widgets/checkbox', $this->_args);
+	}
+}
+
+/**
+ * 
+ */
+class CheckboxWidgetUDF extends CheckboxWidget
+{
+	/**
+	 * 
+	 */
+	public function render($parameters)
+	{
+		$tmpValues = array();
+		
+		// 
+		foreach($parameters as $parameter)
+		{
+			// 
+			if (is_string($parameter) || is_numeric($parameter))
+			{
+				array_push($tmpValues, $parameter); // 
+			}
+		}
+		
+		$this->setValuesArray(success($tmpValues));
+		
+		$this->loadCheckboxView();
+		
+		echo $this->content();
+    }
+}
+
 /**
  * 
  */
diff --git a/application/models/system/UDF_model.php b/application/models/system/UDF_model.php
index 85bfec8bd..e33cdd275 100644
--- a/application/models/system/UDF_model.php
+++ b/application/models/system/UDF_model.php
@@ -12,4 +12,31 @@ class UDF_model extends DB_Model
 		$this->pk = array('schema', 'table');
 		$this->hasSequence = false;
 	}
+	
+	/**
+	 * 
+	 */
+	public function execQuery($query, $parametersArray = null)
+	{
+		// 
+		if (
+			(
+				substr($query, 0, 6) == 'SELECT'
+				|| substr($query, 0, 4) == 'WITH'
+			)
+			&&
+			(
+				!stripos($query, 'INSERT')
+				&& !stripos($query, 'UPDATE')
+				&& !stripos($query, 'DELETE')
+			)
+		)
+		{
+			return parent::execQuery($query, $parametersArray);
+		}
+		else
+		{
+			return error('You are allowed to run only query for reading data');
+		}
+	}
 }
\ No newline at end of file
diff --git a/application/views/system/testudf.php b/application/views/system/testudf.php
index d8f3439d4..1d5815446 100644
--- a/application/views/system/testudf.php
+++ b/application/views/system/testudf.php
@@ -6,12 +6,87 @@
 			<?php
 				echo $this->widgetlib->UDFWidget(
 					array(
-						UDFWidgetTpl::SCHEMA_ARG_NAME => $schema,
-						UDFWidgetTpl::TABLE_ARG_NAME => $table,
-						UDFWidgetTpl::FIELD_ARG_NAME => $field,
-						DropdownWidget::SELECTED_ELEMENT => $selected
+						UDFWidgetTpl::SCHEMA_ARG_NAME => 'public',
+						UDFWidgetTpl::TABLE_ARG_NAME => 'tbl_person',
+						UDFWidgetTpl::FIELD_ARG_NAME => 'schuhgroesse',
+						DropdownWidget::SELECTED_ELEMENT => array(42, 44)
 					),
-					array('id' => 'schuhgroesseID', 'name' => 'schuhgroesseName', 'size' => '6')
+					array('id' => 'schuhgroesseID', 'name' => 'schuhgroesseName', 'size' => '9')
+				);
+			?>
+		</div>
+		
+		<br/>
+		
+		<div>
+			<?php
+				echo $this->widgetlib->UDFWidget(
+					array(
+						UDFWidgetTpl::SCHEMA_ARG_NAME => 'public',
+						UDFWidgetTpl::TABLE_ARG_NAME => 'tbl_person',
+						UDFWidgetTpl::FIELD_ARG_NAME => 'headSize'
+					),
+					array('id' => 'headSizeID', 'name' => 'headSizeName')
+				);
+			?>
+		</div>
+		
+		<br/>
+		
+		<div>
+			<?php
+				echo $this->widgetlib->UDFWidget(
+					array(
+						UDFWidgetTpl::SCHEMA_ARG_NAME => 'public',
+						UDFWidgetTpl::TABLE_ARG_NAME => 'tbl_person',
+						UDFWidgetTpl::FIELD_ARG_NAME => 'bellySize'
+					),
+					array('id' => 'bellySizeID', 'name' => 'bellySizeName')
+				);
+			?>
+		</div>
+		
+		<br/>
+		
+		<div>
+			<?php
+				echo $this->widgetlib->UDFWidget(
+					array(
+						UDFWidgetTpl::SCHEMA_ARG_NAME => 'public',
+						UDFWidgetTpl::TABLE_ARG_NAME => 'tbl_person',
+						UDFWidgetTpl::FIELD_ARG_NAME => 'nickname'
+					),
+					array('id' => 'nicknameID', 'name' => 'nicknameName')
+				);
+			?>
+		</div>
+		
+		<br/>
+		
+		<div>
+			<?php
+				echo $this->widgetlib->UDFWidget(
+					array(
+						UDFWidgetTpl::SCHEMA_ARG_NAME => 'public',
+						UDFWidgetTpl::TABLE_ARG_NAME => 'tbl_person',
+						UDFWidgetTpl::FIELD_ARG_NAME => 'age'
+					),
+					array('id' => 'ageID', 'name' => 'ageName')
+				);
+			?>
+		</div>
+		
+		<br/>
+		
+		<div>
+			<?php
+				echo $this->widgetlib->UDFWidget(
+					array(
+						UDFWidgetTpl::SCHEMA_ARG_NAME => 'public',
+						UDFWidgetTpl::TABLE_ARG_NAME => 'tbl_person',
+						UDFWidgetTpl::FIELD_ARG_NAME => 'agree'
+					),
+					array('id' => 'agreeID', 'name' => 'agreeName')
 				);
 			?>
 		</div>
diff --git a/application/views/widgets/checkbox.php b/application/views/widgets/checkbox.php
new file mode 100644
index 000000000..531aca9c3
--- /dev/null
+++ b/application/views/widgets/checkbox.php
@@ -0,0 +1,40 @@
+<?php
+	if (isset(${Widget::HTML_ARG_NAME}[UDFWidgetTpl::LABEL]))
+	{
+?>
+	<label for="<?php echo ${Widget::HTML_ARG_NAME}[Widget::HTML_ID]; ?>">
+		<?php echo ${Widget::HTML_ARG_NAME}[UDFWidgetTpl::LABEL]; ?>
+	</label>
+<?php
+	}
+?>
+<fieldset
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, Widget::HTML_ID); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::REQUIRED); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::REGEX); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::TITLE); ?>
+>
+	<?php
+		$values = ${CheckboxWidget::WIDGET_DATA_VALUES_ARRAY_NAME};
+		$checkedValue = ${CheckboxWidget::CHECKED_VALUE};
+		
+		foreach($values as $value)
+		{
+			$checked = '';
+			
+			if ($value == $checkedValue)
+			{
+				$checked = 'checked';
+			}
+	?>
+		<input
+			type="checkbox"
+			<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, Widget::HTML_NAME); ?>
+			value="<?php echo $value; ?>"
+			<?php echo $checked; ?>
+		>
+		
+	<?php
+		}
+	?>
+</fieldset>
\ No newline at end of file
diff --git a/application/views/widgets/textarea.php b/application/views/widgets/textarea.php
index c8508670f..44ee51953 100644
--- a/application/views/widgets/textarea.php
+++ b/application/views/widgets/textarea.php
@@ -8,17 +8,15 @@
 <?php
 	}
 ?>
-
 <textarea
 	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, Widget::HTML_ID); ?>
 	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, Widget::HTML_NAME); ?>
 	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, TextareaWidget::ROWS); ?>
 	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, TextareaWidget::COLS); ?>
 	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::REQUIRED); ?>
-	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::MAX_VALUE); ?>
-	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::MIN_VALUE); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::PLACEHOLDER); ?>
 	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::REGEX); ?>
 	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::TITLE); ?>
 >
-	<?php echo ${TextareaWidget::TEXT}; ?>
+<?php echo ${TextareaWidget::TEXT}; ?>
 </textarea>
\ No newline at end of file
diff --git a/application/views/widgets/textfield.php b/application/views/widgets/textfield.php
new file mode 100644
index 000000000..ac0d22547
--- /dev/null
+++ b/application/views/widgets/textfield.php
@@ -0,0 +1,21 @@
+<?php
+	if (isset(${Widget::HTML_ARG_NAME}[UDFWidgetTpl::LABEL]))
+	{
+?>
+	<label for="<?php echo ${Widget::HTML_ARG_NAME}[Widget::HTML_ID]; ?>">
+		<?php echo ${Widget::HTML_ARG_NAME}[UDFWidgetTpl::LABEL]; ?>
+	</label>
+<?php
+	}
+?>
+<input
+	type="text"
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, Widget::HTML_ID); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, Widget::HTML_NAME); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, TextfieldWidget::SIZE); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::REQUIRED); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::PLACEHOLDER); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::REGEX); ?>
+	<?php Widget::printAttribute(${Widget::HTML_ARG_NAME}, UDFWidgetTpl::TITLE); ?>
+	value="<?php echo ${TextfieldWidget::VALUE}; ?>"
+>
\ No newline at end of file
diff --git a/application/widgets/UDFWidget.php b/application/widgets/UDFWidget.php
index a2686729a..920be185c 100644
--- a/application/widgets/UDFWidget.php
+++ b/application/widgets/UDFWidget.php
@@ -125,11 +125,11 @@ class UDFWidget extends UDFWidgetTpl
 		// Type
 		if ($jsonSchema->type == 'checkbox')
 		{
-			
+			$this->_renderCheckbox($jsonSchema);
 		}
 		else if ($jsonSchema->type == 'textfield')
 		{
-			
+			$this->_renderTextfield($jsonSchema);
 		}
 		else if ($jsonSchema->type == 'textarea')
 		{
@@ -155,16 +155,21 @@ class UDFWidget extends UDFWidgetTpl
 	private function _renderDropdown($jsonSchema, $multiple = false)
 	{
 		$dropdownWidgetUDF = new DropdownWidgetUDF($this->_name, $this->_args);
-			
 		$parameters = array();
 		
+		// 
 		if (isset($jsonSchema->listValues->enum))
 		{
 			$parameters = $jsonSchema->listValues->enum;
 		}
+		// 
 		else if (isset($jsonSchema->listValues->sql))
 		{
-			$parameters = $jsonSchema->listValues->sql;
+			$queryResult = $this->UDFModel->execQuery($jsonSchema->listValues->sql);
+			if (hasData($queryResult))
+			{	
+				$parameters = $queryResult->retval;
+			}
 		}
 		
 		if ($multiple)
@@ -180,15 +185,45 @@ class UDFWidget extends UDFWidgetTpl
      */
 	private function _renderTextarea($jsonSchema)
 	{
-		$textareaUDF = new TextareaUDF($this->_name, $this->_args);
+		$textareaUDF = new TextareaWidgetUDF($this->_name, $this->_args);
 			
-		$text = '';
-		if (isset($jsonSchema->defaultValue))
+		$textareaUDF->render(null);
+	}
+	
+	/**
+     * 
+     */
+	private function _renderTextfield($jsonSchema)
+	{
+		$textareaUDF = new TextfieldWidgetUDF($this->_name, $this->_args);
+			
+		$textareaUDF->render(null);
+	}
+	
+	/**
+     * 
+     */
+	private function _renderCheckbox($jsonSchema)
+	{
+		$checkboxWidgetUDF = new CheckboxWidgetUDF($this->_name, $this->_args);
+		$parameters = array();
+		
+		// 
+		if (isset($jsonSchema->listValues->enum))
 		{
-			$text = $jsonSchema->defaultValue;
+			$parameters = $jsonSchema->listValues->enum;
+		}
+		// 
+		else if (isset($jsonSchema->listValues->sql))
+		{
+			$queryResult = $this->UDFModel->execQuery($jsonSchema->listValues->sql);
+			if (hasData($queryResult))
+			{	
+				$parameters = $queryResult->retval;
+			}
 		}
 		
-		$textareaUDF->render($text);
+		$checkboxWidgetUDF->render($parameters);
 	}
     
     /**