diff --git a/lib/Bridge.php b/lib/Bridge.php
index 8f0c356..d6b1587 100644
--- a/lib/Bridge.php
+++ b/lib/Bridge.php
@@ -114,12 +114,12 @@ abstract class BridgeAbstract implements BridgeInterface {
     protected $cache;
     protected $items = array();
 
-    public $name = 'Unnamed bridge';
-    public $uri = '';
-    public $description = 'No description provided';
-    public $maintainer = 'No maintainer';
+    const NAME = 'Unnamed bridge';
+    const URI = '';
+    const DESCRIPTION = 'No description provided';
+    const MAINTAINER = 'No maintainer';
+    const PARAMETERS = array();
     public $useProxy = true;
-    public $parameters = array();
     public $inputs = array();
     protected $queriedContext='';
 
@@ -199,28 +199,28 @@ abstract class BridgeAbstract implements BridgeInterface {
         if(!is_array($data))
             return false;
 
-        foreach($data as $name => $value){
-            $registered = false;
-            foreach($this->parameters as $context => $set){
-                if(array_key_exists($name, $set)){
-                    $registered = true;
-
-                    if(!isset($set[$name]['type'])){ // Default to 'text'
-                        $set[$name]['type'] = 'text';
+        $validated=true;
+        foreach($data as $name=>$value){
+            $registered=false;
+            foreach(static::PARAMETERS as $context=>$set){
+                if(array_key_exists($name,$set)){
+                    $registered=true;
+                    if(!isset($set[$name]['type'])){
+                        $set[$name]['type']='text';
                     }
 
                     switch($set[$name]['type']){
-                    case 'number': 
+                    case 'number':
                         $data[$name] = $this->isValidNumberValue($value);
                         break;
-                    case 'checkbox': 
+                    case 'checkbox':
                         $data[$name] = $this->isValidCheckboxValue($value);
                         break;
-                    case 'list': 
+                    case 'list':
                         $data[$name] = $this->isValidListValue($value, $set[$name]['values']);
                         break;
                     default:
-                    case 'text': 
+                    case 'text':
                         if(isset($set[$name]['pattern'])){
                             $data[$name] = $this->isValidTextValue($value, $set[$name]['pattern']);
                         } else {
@@ -245,7 +245,7 @@ abstract class BridgeAbstract implements BridgeInterface {
 
     protected function getQueriedContext(){
         $queriedContexts=array();
-        foreach($this->parameters as $context=>$set){
+        foreach(static::PARAMETERS as $context=>$set){
             $queriedContexts[$context]=null;
             foreach($set as $id=>$properties){
                 if(isset($properties['value']) &&
@@ -259,7 +259,7 @@ abstract class BridgeAbstract implements BridgeInterface {
             }
         }
 
-        if(isset($this->parameters['global']) &&
+        if(array_key_exists('global',static::PARAMETERS) &&
             $queriedContexts['global']===false){
             return null;
         }
@@ -293,7 +293,7 @@ abstract class BridgeAbstract implements BridgeInterface {
             }
         }
 
-        if(empty($this->parameters)){
+        if(empty(static::PARAMETERS)){
             if(!empty($inputs)){
                 $this->returnClientError('Invalid parameters value(s)');
             }
@@ -311,8 +311,8 @@ abstract class BridgeAbstract implements BridgeInterface {
 
         // Populate BridgeAbstract::parameters with sanitized data
         foreach($inputs as $name=>$value){
-            foreach($this->parameters as $context=>$set){
-                if(isset($this->parameters[$context][$name])){
+            foreach(static::PARAMETERS as $context=>$set){
+                if(array_key_exists($name,static::PARAMETERS[$context])){
                     $this->inputs[$context][$name]['value']=$value;
                     $this->parameters[$context][$name]['value']=$value;
                 }
@@ -331,13 +331,15 @@ abstract class BridgeAbstract implements BridgeInterface {
 
         // Apply default values to missing data
         $contexts=array($this->queriedContext);
-        if(isset($this->parameters['global'])){
+        if(array_key_exists('global',static::PARAMETERS)){
             $contexts[]='global';
         }
         foreach($contexts as $context){
-            foreach($this->parameters[$context] as $name=>$properties){
+            foreach(static::PARAMETERS[$context] as $name=>$properties){
                 if(!isset($properties['type'])){
-                    $this->parameters[$context][$name]['type']='text';
+                  $type='text';
+                }else{
+                  $type=$properties['type'];
                 }
                 if(isset($properties['value'])){
                     continue;
@@ -371,8 +373,8 @@ abstract class BridgeAbstract implements BridgeInterface {
         }
 
         // Copy global parameter values to the guessed context
-        if(isset($this->parameters['global'])){
-            foreach($this->parameters['global'] as $name=>$properties){
+        if(array_key_exists('global',static::PARAMETERS)){
+            foreach(static::PARAMETERS['global'] as $name=>$properties){
                 if(isset($inputs[$name])){
                     $value=$inputs[$name];
                 }else if(isset($properties['value'])){
@@ -405,11 +407,11 @@ abstract class BridgeAbstract implements BridgeInterface {
     }
 
     public function getName(){
-        return $this->name;
+        return static::NAME;
     }
 
     public function getURI(){
-        return $this->uri;
+        return static::URI;
     }
 
     public function getCacheDuration(){
@@ -585,6 +587,10 @@ abstract class HttpCachingBridgeAbstract extends BridgeAbstract {
 
 abstract class RssExpander extends HttpCachingBridgeAbstract {
 
+  private $name;
+  private $uri;
+  private $description;
+
     public function collectExpandableDatas($name){
         if(empty($name)){
             $this->returnServerError('There is no $name for this RSS expander');
@@ -632,6 +638,14 @@ abstract class RssExpander extends HttpCachingBridgeAbstract {
      */
     abstract protected function parseRSSItem($item);
 
+    public function getURI(){
+      return $this->uri;
+    }
+
+    public function getName(){
+      return $this->name;
+    }
+
     public function getDescription(){
         return $this->description;
     }
diff --git a/lib/HTMLUtils.php b/lib/HTMLUtils.php
index cbfa0af..7e0061d 100644
--- a/lib/HTMLUtils.php
+++ b/lib/HTMLUtils.php
@@ -3,12 +3,13 @@ class HTMLUtils {
 
 	public static function displayBridgeCard($bridgeName, $formats, $isActive = true){
 		$bridgeElement = Bridge::create($bridgeName);
+        $bridgeClass=$bridgeName.'Bridge';
 
 		if($bridgeElement == false)
 			return "";
 
-		$name = '<a href="' . $bridgeElement->uri . '">' . $bridgeElement->name . '</a>';
-		$description = $bridgeElement->description;
+		$name = '<a href="' . $bridgeClass::URI . '">' . $bridgeClass::NAME . '</a>';
+		$description = $bridgeClass::DESCRIPTION;
 
 		$card = <<<CARD
 		<section id="bridge-{$bridgeName}" data-ref="{$bridgeName}">
@@ -21,7 +22,7 @@ class HTMLUtils {
 CARD;
 
 		// If we don't have any parameter for the bridge, we print a generic form to load it.
-		if(count($bridgeElement->parameters) == 0) {
+		if(count($bridgeClass::PARAMETERS) == 0) {
 
 			$card .= HTMLUtils::getFormHeader($bridgeName);
 
@@ -40,13 +41,13 @@ CARD;
 			$card .= '</form>' . PHP_EOL;
 		}
 
-		$hasGlobalParameter = array_key_exists('global', $bridgeElement->parameters);
+		$hasGlobalParameter = array_key_exists('global', $bridgeClass::PARAMETERS);
 
 		if($hasGlobalParameter){
-			$globalParameters = $bridgeElement->parameters['global'];
+			$globalParameters = $bridgeClass::PARAMETERS['global'];
 		}
 
-		foreach($bridgeElement->parameters as $parameterName => $parameter){
+		foreach($bridgeClass::PARAMETERS as $parameterName => $parameter){
 			if(!is_numeric($parameterName) && $parameterName == 'global')
 				continue;
 
@@ -129,7 +130,7 @@ CARD;
 		}
 
 		$card .= '<label class="showless" for="showmore-' . $bridgeName . '">Show less</label>';
-		$card .= '<p class="maintainer">' . $bridgeElement->maintainer . '</p>';
+		$card .= '<p class="maintainer">' . $bridgeClass::MAINTAINER . '</p>';
 		$card .= '</section>';
 
 		return $card;