diff --git a/classes/Country.php b/classes/Country.php
index f1da9b7f0..9dc325b2b 100644
--- a/classes/Country.php
+++ b/classes/Country.php
@@ -95,8 +95,8 @@ class CountryCore extends ObjectModel
 	protected $webserviceParameters = array(
 		'objectsNodeName' => 'countries',
 		'fields' => array(
-			'id_zone' => array('sqlId' => 'id_zone', 'xlink_resource'=> 'zones'),
-			'id_currency' => array('sqlId' => 'id_currency', 'xlink_resource'=> 'currencies'),
+			'id_zone' => array('xlink_resource'=> 'zones'),
+			'id_currency' => array('xlink_resource'=> 'currencies'),
 		),
 	);
 
diff --git a/classes/ObjectModel.php b/classes/ObjectModel.php
index 806cd8757..54a4737c1 100644
--- a/classes/ObjectModel.php
+++ b/classes/ObjectModel.php
@@ -851,7 +851,7 @@ abstract class ObjectModelCore
 		$resource_parameters = array_merge_recursive($default_resource_parameters, $this->{$ws_params_attribute_name});
 
 		$required_fields = (isset(self::$fieldsRequiredDatabase[get_class($this)]) ? self::$fieldsRequiredDatabase[get_class($this)] : array());
-		foreach ($this->definition['fields'] as $field_name => $details)
+		foreach ($this->def['fields'] as $field_name => $details)
 		{
 			if (!isset($resource_parameters['fields'][$field_name]))
 				$resource_parameters['fields'][$field_name] = array();
@@ -910,6 +910,7 @@ abstract class ObjectModelCore
 		WHERE 1 '.$sql_filter.'
 		'.($sql_sort != '' ? $sql_sort : '').'
 		'.($sql_limit != '' ? $sql_limit : '');
+
 		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
 	}
 
diff --git a/classes/TranslatedConfiguration.php b/classes/TranslatedConfiguration.php
index cb8d3b134..31cac209f 100755
--- a/classes/TranslatedConfiguration.php
+++ b/classes/TranslatedConfiguration.php
@@ -36,9 +36,24 @@ class TranslatedConfigurationCore extends Configuration
 			'date_upd' => array('i18n' => true),
 		),
 	);
-	
+
+	public static $definition = array(
+		'table' => 'configuration',
+		'primary' => 'id_configuration',
+		'multilang' => true,
+		'fields' => array(
+			'name' => 			array('type' => self::TYPE_STRING, 'validate' => 'isConfigName', 'required' => true, 'size' => 32),
+			'id_group_shop' => 	array('type' => self::TYPE_NOTHING, 'validate' => 'isUnsignedId'),
+			'id_shop' => 		array('type' => self::TYPE_NOTHING, 'validate' => 'isUnsignedId'),
+			'value' => 			array('type' => self::TYPE_STRING),
+			'date_add' => 		array('type' => self::TYPE_DATE, 'validate' => 'isDate'),
+			'date_upd' => 		array('type' => self::TYPE_DATE, 'validate' => 'isDate'),
+		),
+	);
+
 	public function __construct($id = NULL, $id_lang = NULL)
 	{
+		$this->def = ObjectModel::getDefinition($this);
 		// Check if the id configuration is set in the configuration_lang table.
 		// Otherwise configuration is not set as translated configuration.
 		if ($id !== null)
diff --git a/classes/tax/TaxRule.php b/classes/tax/TaxRule.php
index 223bb892b..0c0bfbb32 100644
--- a/classes/tax/TaxRule.php
+++ b/classes/tax/TaxRule.php
@@ -56,7 +56,7 @@ class TaxRuleCore extends ObjectModel
 
     protected $webserviceParameters = array(
         'fields' => array(
-            'id_tax_rules_group' => array('xlink_resource'=> 'tax_rules_group'),
+            'id_tax_rules_group' => array('xlink_resource'=> 'tax_rule_groups'),
             'id_state' => array('xlink_resource'=> 'states'),
             'id_country' => array('xlink_resource'=> 'countries')
         ),
diff --git a/classes/tax/TaxRulesGroup.php b/classes/tax/TaxRulesGroup.php
index a0816147b..758931b00 100644
--- a/classes/tax/TaxRulesGroup.php
+++ b/classes/tax/TaxRulesGroup.php
@@ -41,10 +41,17 @@ class TaxRulesGroupCore extends ObjectModel
 		'primary' => 'id_tax_rules_group',
 		'fields' => array(
 			'name' =>	array('type' => self::TYPE_STRING, 'validate' => 'isGenericName', 'required' => true, 'size' => 64),
-			'active' =>	array('type' => self::TYPE_BOOL),
+			'active' =>	array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),
 		),
 	);
 
+    protected $webserviceParameters = array(
+	'objectsNodeName' => 'tax_rule_groups',
+	'objectNodeName' => 'tax_rule_group',
+        'fields' => array(
+        ),
+    );
+
     protected static $_taxes = array();
 
 	public static function getTaxRulesGroups($only_active = true)
diff --git a/classes/webservice/WebserviceRequest.php b/classes/webservice/WebserviceRequest.php
index cb5d9b909..4b3d31a98 100644
--- a/classes/webservice/WebserviceRequest.php
+++ b/classes/webservice/WebserviceRequest.php
@@ -277,7 +277,8 @@ class WebserviceRequestCore
 			'supply_order_histories' => array('description' => 'Supply Order Histories', 'class' => 'SupplyOrderHistory', 'forbidden_method' => array('PUT', 'POST', 'DELETE')),
 			'supply_order_receipt_histories' => array('description' => 'Supply Order Receipt Histories', 'class' => 'SupplyOrderReceiptHistory', 'forbidden_method' => array('PUT', 'POST', 'DELETE')),
 			'product_suppliers' => array('description' => 'Product Suppliers', 'class' => 'ProductSupplier', 'forbidden_method' => array('PUT', 'POST', 'DELETE')),
-			'tax_rules' => array('description' => 'Tax rules entity', 'class' => 'TaxRule', 'forbidden_method' => array('PUT', 'POST', 'DELETE')),
+			'tax_rules' => array('description' => 'Tax rules entity', 'class' => 'TaxRule'),
+			'tax_rule_groups' => array('description' => 'Tax rule groups', 'class' => 'TaxRulesGroup'),
 		);
 		ksort($resources);
 		return $resources;