diff --git a/lib/Alchemy/Phrasea/Controller/Admin/Fields.php b/lib/Alchemy/Phrasea/Controller/Admin/Fields.php
index 3968909c39..d2dd834a9a 100644
--- a/lib/Alchemy/Phrasea/Controller/Admin/Fields.php
+++ b/lib/Alchemy/Phrasea/Controller/Admin/Fields.php
@@ -17,7 +17,7 @@ use Silex\Application;
 use Silex\ControllerProviderInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
-use PHPExiftool\Exception\TagUnknown;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 
 class Fields implements ControllerProviderInterface
 {
@@ -90,85 +90,51 @@ class Fields implements ControllerProviderInterface
 
     public function updateFields(Application $app, Request $request, $sbas_id)
     {
-        $json = array(
-            'success'   => false,
-            // use to store the updated collection
-            'fields'    => array(),
-            'messages'  => array()
-        );
-
+        $fields = array();
         $databox = $app['phraseanet.appbox']->get_databox((int) $sbas_id);
+        $metaStructure = $databox->get_meta_structure();
         $connection = $databox->get_connection();
         $data = $this->getFieldsJsonFromRequest($app, $request);
 
-        // calculate max position
-        try {
-            $stmt = $connection->prepare('SELECT MAX(sorter) as max_position FROM metadatas_structure');
-            $stmt->execute();
-            $row = $stmt->fetch(\PDO::FETCH_ASSOC);
-            $stmt->closeCursor();
-            $maxPosition = $row['max_position'] + 1;
-        } catch (\PDOException $e) {
-            $app->abort(500);
-        }
-
         $connection->beginTransaction();
-        $i = 0;
+
         foreach ($data as $jsonField) {
             try {
-                $jsonField['sorter'] = $jsonField['sorter'] + $maxPosition;
                 $field = \databox_field::get_instance($app, $databox, $jsonField['id']);
+
+                if ($field->get_name() !== $jsonField['name']) {
+                    $this->validateNameField($metaStructure, $jsonField);
+                }
+
+                $this->validateTagField($jsonField);
+
                 $this->updateFieldWithData($app, $field, $jsonField);
                 $field->save();
-                $json['fields'][] = $field->toArray();
-                $i++;
-            } catch (\PDOException $e) {
-                if ($e->errorInfo[1] == 1062) {
-                    $json['messages'][] = _(sprintf('Field name %s already exists', $jsonField['name']));
-                } else {
-                    $json['messages'][] = _(sprintf('Field %s could not be saved, please retry or contact an administrator if problem persists', $jsonField['name']));
-                }
+                $fields[] = $field->toArray();
             } catch (\Exception $e) {
-                if ($e instanceof \Exception_Databox_metadataDescriptionNotFound || $e->getPrevious() instanceof TagUnknown) {
-                    $json['messages'][] = _(sprintf('Provided tag %s is unknown', $jsonField['tag']));
-                } else {
-                    $json['messages'][] = _(sprintf('Field %s could not be saved, please retry or contact an administrator if problem persists', $jsonField['name']));
-                }
+                $connection->rollback();
+                $app->abort(500, _(sprintf('Field %s could not be saved, please try again or contact an admin', $jsonField['name'])));
+                break;
             }
         }
 
-        if ($i === count($data)) {
-            // update field position in database, this query forces to update all fields each time
-            $stmt = $connection->prepare(sprintf('UPDATE metadatas_structure SET sorter = (sorter - %s)', $maxPosition));
-            $row = $stmt->execute();
-            $stmt->closeCursor();
+        $connection->commit();
 
-            $connection->commit();
-
-            $json['success'] = true;
-            $json['messages'][] = _('Fields configuration has been saved');
-
-            // update field position in array
-            array_walk($json['fields'], function(&$field) use ($maxPosition) {
-               $field['sorter'] = $field['sorter'] - $maxPosition;
-            });
-        } else {
-            $connection->rollback();
-        }
-
-        return $app->json($json);
+        return $app->json($fields);
     }
 
     public  function getLanguage(Application $app, Request $request)
     {
         return $app->json(array(
-            'something_wrong'           => _('Something wrong happened, please try again or contact an admin if problem persists'),
+            'something_wrong'           => _('Something wrong happened, please try again or contact an admin'),
+            'created_success'           => _('%s field has been created with success'),
             'deleted_success'           => _('%s field has been deleted with success'),
             'are_you_sure_delete'       => _('Do you really want to delete the field %s ?'),
             'validation_blank'          => _('Field can not be blank'),
             'validation_name_exists'    => _('Field name already exists'),
             'validation_tag_invalid'    => _('Field source is not valid'),
             'field_error'               => _('Field %s contains errors'),
+            'fields_save'               => _('Your configuration has been successfuly saved'),
         ));
     }
 
@@ -245,40 +211,26 @@ class Fields implements ControllerProviderInterface
     }
 
     public function createField(Application $app, Request $request, $sbas_id) {
-        $json = array(
-            'success' => false,
-            'message' => _('Something wrong happened, please try again or contact an admin if problem persists'),
-            'field'   => array()
-        );
-        $headers = array();
-
         $databox = $app['phraseanet.appbox']->get_databox((int) $sbas_id);
         $data = $this->getFieldJsonFromRequest($app, $request);
 
+        $metaStructure = $databox->get_meta_structure();
+        $this->validateNameField($metaStructure, $data);
+        $this->validateTagField($data);
+
         try {
             $field = \databox_field::create($app, $databox, $data['name'], $data['multi']);
-
             $this->updateFieldWithData($app, $field, $data);
             $field->save();
-
-            $json['success'] = true;
-            $headers['location'] = $app->path('admin_fields_show_field', array(
-                'sbas_id' => $sbas_id,
-                'id'      => $field->get_id(),
-            ));
-            $json['message'] = _(sprintf('Tag name %s has been created successfully', $data['name']));
-            $json['field'] = $field->toArray();
-        } catch (\PDOException $e) {
-            if ($e->errorInfo[1] == 1062) {
-                $json['message'] = _(sprintf('Field name %s already exists', $data['name']));
-            }
         } catch (\Exception $e) {
-            if ($e instanceof \Exception_Databox_metadataDescriptionNotFound || $e->getPrevious() instanceof TagUnknown) {
-                $json['message'] = _(sprintf('Provided tag %s is unknown', $data['tag']));
-            }
+            $app->abort(500, _(sprintf('Field %s could not be created, please try again or contact an admin', $data['name'])));
         }
 
-        return $app->json($json, 201, $headers);
+        return $app->json($field->toArray(), 201, array(
+            'location' => $app->path('admin_fields_show_field', array(
+                'sbas_id' => $sbas_id,
+                'id' => $field->get_id()
+        ))));
     }
 
     public function listFields(Application $app, $sbas_id) {
@@ -301,6 +253,13 @@ class Fields implements ControllerProviderInterface
         $field = \databox_field::get_instance($app, $databox, $id);
         $data = $this->getFieldJsonFromRequest($app, $request);
 
+        $this->validateTagField($data);
+
+        if ($field->get_name() !== $data['name']) {
+            $metaStructure = $databox->get_meta_structure();
+            $this->validateNameField($metaStructure, $data);
+        }
+
         $this->updateFieldWithData($app, $field, $data);
         $field->save();
 
@@ -317,13 +276,7 @@ class Fields implements ControllerProviderInterface
 
     private function getFieldJsonFromRequest(Application $app, Request $request)
     {
-        $body = $request->getContent();
-        $data = @json_decode($body, true);
-
-        if (JSON_ERROR_NONE !== json_last_error()) {
-            $app->abort(400, 'Body must contain a valid JSON payload');
-        }
-
+        $data = $this->requestBodyToJson($request);
         $required = $this->getMandatoryFieldProperties();
 
         foreach ($required as $key) {
@@ -337,13 +290,7 @@ class Fields implements ControllerProviderInterface
 
     private function getFieldsJsonFromRequest(Application $app, Request $request)
     {
-        $body = $request->getContent();
-        $data = @json_decode($body, true);
-
-        if (JSON_ERROR_NONE !== json_last_error()) {
-            $app->abort(400, 'Body must contain a valid JSON payload');
-        }
-
+        $data = $this->requestBodyToJson($request);
         $required = $this->getMandatoryFieldProperties();
 
         foreach($data as $field) {
@@ -386,14 +333,15 @@ class Fields implements ControllerProviderInterface
 
         }
 
-        $dces_element = null;
+        if ('' !== $dcesElement = (string) $data['dces-element']) {
+            $class = sprintf('\databox_Field_DCES_%s', $dcesElement);
 
-        $class = '\databox_Field_DCES_' . $data['dces-element'];
-        if (class_exists($class)) {
-            $dces_element = new $class();
+            if (!class_exists($class)) {
+                throw new BadRequestHttpException(sprintf('DCES element %s does not exist', $dcesElement));
+            }
+
+            $field->set_dces_element(new $class());
         }
-
-        $field->set_dces_element($dces_element);
     }
 
     private function getMandatoryFieldProperties()
@@ -404,4 +352,32 @@ class Fields implements ControllerProviderInterface
             'vocabulary-type', 'vocabulary-restricted', 'dces-element'
         );
     }
+
+    private function validateNameField(\databox_descriptionStructure $metaStructure, array $field)
+    {
+        if (null !== $metaStructure->get_element_by_name($field['name'])) {
+            throw new BadRequestHttpException(_(sprintf('Field %s already exists', $field['name'])));
+        }
+    }
+
+    private function validateTagField(array $field)
+    {
+        try {
+            \databox_field::loadClassFromTagName($field['tag']);
+        } catch(\Exception_Databox_metadataDescriptionNotFound $e) {
+            throw new BadRequestHttpException(_(sprintf('Provided tag %s is unknown', $field['tag'])));
+        }
+    }
+
+    private function requestBodyToJson(Request $request)
+    {
+        $body = $request->getContent();
+        $data = @json_decode($body, true);
+
+        if (JSON_ERROR_NONE !== json_last_error()) {
+            throw new BadRequestHttpException('Body must contain a valid JSON payload');
+        }
+
+        return $data;
+    }
 }
diff --git a/lib/classes/databox/descriptionStructure.php b/lib/classes/databox/descriptionStructure.php
index 4445b00219..1aa64f287a 100644
--- a/lib/classes/databox/descriptionStructure.php
+++ b/lib/classes/databox/descriptionStructure.php
@@ -14,7 +14,7 @@
  * @license     http://opensource.org/licenses/gpl-3.0 GPLv3
  * @link        www.phraseanet.com
  */
-class databox_descriptionStructure implements IteratorAggregate
+class databox_descriptionStructure implements IteratorAggregate, Countable
 {
     /**
      *
@@ -138,4 +138,13 @@ class databox_descriptionStructure implements IteratorAggregate
             return $element->toArray();
         }, array_values($this->elements));
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function count()
+    {
+        return count($this->elements);
+    }
 }
+
diff --git a/lib/classes/databox/field.php b/lib/classes/databox/field.php
index bba7f1b6c4..1bf224538b 100644
--- a/lib/classes/databox/field.php
+++ b/lib/classes/databox/field.php
@@ -175,7 +175,11 @@ class databox_field implements cache_cacheableInterface
 
         $connbas = $this->get_connection();
 
-        $sql = "SELECT * FROM metadatas_structure WHERE id=:id";
+        $sql = "SELECT `thumbtitle`, `separator`, `dces_element`, `tbranch`,
+                `type`, `report`, `multi`, `required`, `readonly`, `indexable`,
+                `name`, `src`, `business`, `VocabularyControlType`,
+                `RestrictToVocabularyControl`, `sorter`
+              FROM metadatas_structure WHERE id=:id";
 
         $stmt = $connbas->prepare($sql);
         $stmt->execute(array(':id' => $id));
@@ -805,21 +809,21 @@ class databox_field implements cache_cacheableInterface
     }
 
     /**
-     *
      * @return string
      */
     public function get_name()
     {
         return $this->name;
     }
+
     /**
-     *
      * @return string
      */
     public function get_position()
     {
         return $this->position;
     }
+
     /**
      *
      * @return string
@@ -859,7 +863,7 @@ class databox_field implements cache_cacheableInterface
             'readonly'              => $this->readonly,
             'multi'                 => $this->multi,
             'indexable'             => $this->indexable,
-            'dces-element'          => $this->dces_element ? $this->dces_element->get_label(): null,
+            'dces-element'          => $this->dces_element ? $this->dces_element->get_label() : null,
             'vocabulary-type'       => $this->Vocabulary ? $this->Vocabulary->getType() : null,
             'vocabulary-restricted' => $this->VocabularyRestriction,
         );
diff --git a/lib/conf.d/bases_structure.xml b/lib/conf.d/bases_structure.xml
index 071b5b7098..744c5818c8 100644
--- a/lib/conf.d/bases_structure.xml
+++ b/lib/conf.d/bases_structure.xml
@@ -4748,13 +4748,6 @@
               <field>required</field>
             </fields>
           </index>
-          <index>
-            <name>sorter</name>
-            <type>UNIQUE</type>
-            <fields>
-              <field>sorter</field>
-            </fields>
-          </index>
         </indexes>
         <engine>InnoDB</engine>
       </table>
diff --git a/templates/web/admin/fields/index.html.twig b/templates/web/admin/fields/index.html.twig
index 80c6c171b1..a841cd8ae6 100644
--- a/templates/web/admin/fields/index.html.twig
+++ b/templates/web/admin/fields/index.html.twig
@@ -8,7 +8,7 @@
         <div class="span4 save-block">
             {# set loading state, this will be removed once backbone application is fully loaded #}
             <img src="/skins/icons/loaderFFF.gif"/>
-            {% trans %}Loading database documentary fields ...{% endtrans %}
+            {% trans %}Loading database documentary structure ...{% endtrans %}
         </div>
         <div class="span8">
             <div class="block-alert"></div>
@@ -21,5 +21,4 @@
 </div>
 
 {# bootstrap admin field backbone application #}
-<script src="/assets/requirejs/require.js"></script>
-<script src="/scripts/apps/admin/fields/main.js"></script>
+<script type="text/javascript" src="/include/minify/f=/assets/requirejs/require.js,/scripts/apps/admin/fields/main.js"></script>
diff --git a/templates/web/admin/fields/templates.html.twig b/templates/web/admin/fields/templates.html.twig
index c5b8f43096..503ff0ef14 100644
--- a/templates/web/admin/fields/templates.html.twig
+++ b/templates/web/admin/fields/templates.html.twig
@@ -120,7 +120,7 @@
             </tr>
         </table>
         <div class="edit-form">
-            <h4>{% trans  %}Advanced field parameters{% endtrans %}</h4>
+            <h4>{% trans %}Advanced field parameters{% endtrans %}</h4>
             <table>
                 <tr>
                     <td><label for="tbranch">{% trans %}Thesaurus branch{% endtrans %}</label></td>
@@ -172,7 +172,7 @@
                     <td><input id="separator" type="text" value="<%= field.separator %>" /></td>
                 </tr>
             </table>
-            <h4>{% trans  %}Display & action settings{% endtrans %}</h4>
+            <h4>{% trans %}Display & action settings{% endtrans %}</h4>
             <table>
                 <tr>
                     <td>
@@ -194,7 +194,7 @@
                     <td>
                         <label for="readonly" class="checkbox">
                             <input id="readonly" type="checkbox" <%= field.readonly ? "checked='checked'" : "" %> />
-                            {% trans  %}Read only{% endtrans %}
+                            {% trans %}Read only{% endtrans %}
                         </label>
                     </td>
                 </tr>
diff --git a/tests/Alchemy/Tests/Phrasea/Controller/Admin/FieldsTest.php b/tests/Alchemy/Tests/Phrasea/Controller/Admin/FieldsTest.php
index 764cd5436b..54263c9cee 100644
--- a/tests/Alchemy/Tests/Phrasea/Controller/Admin/FieldsTest.php
+++ b/tests/Alchemy/Tests/Phrasea/Controller/Admin/FieldsTest.php
@@ -198,12 +198,10 @@ class ControllerFieldsTest extends \PhraseanetWebTestCaseAuthenticatedAbstract
 
         $data = json_decode($response, true);
 
-        $this->assertArrayHasKey('success', $data);
-        $this->assertArrayHasKey('messages', $data);
-        $this->assertArrayHasKey('fields', $data);
+        $this->assertTrue(is_array($data));
 
         // expect last 2 fields from body equals last 2 fields from response
-        $this->assertEquals(array_splice($body, -2), array_splice($data['fields'], -2));
+        $this->assertEquals(array_splice($body, -2), array_splice($data, -2));
 
         // delete created fields
         foreach($fieldObjects as $field) {
@@ -242,17 +240,15 @@ class ControllerFieldsTest extends \PhraseanetWebTestCaseAuthenticatedAbstract
 
         $data = json_decode($response, true);
 
-        $this->assertArrayHasKey('success', $data);
-        $this->assertArrayHasKey('message', $data);
-        $this->assertArrayHasKey('field', $data);
+        $this->assertTrue(is_array($data));
 
-        $dataWithoutIds = $data['field'];
+        $dataWithoutIds = $data;
         unset($dataWithoutIds['id']);
         unset($dataWithoutIds['sorter']);
 
         $this->assertEquals(json_decode($body, true), $dataWithoutIds);
 
-        $field = \databox_field::get_instance(self::$DI['app'], $databox, $data['field']['id']);
+        $field = \databox_field::get_instance(self::$DI['app'], $databox, $data['id']);
         $field->delete();
     }
 
diff --git a/www/scripts/apps/admin/fields/app.js b/www/scripts/apps/admin/fields/app.js
index 49606f80e0..3916b05b8a 100644
--- a/www/scripts/apps/admin/fields/app.js
+++ b/www/scripts/apps/admin/fields/app.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
diff --git a/www/scripts/apps/admin/fields/collections/dcFields.js b/www/scripts/apps/admin/fields/collections/dcFields.js
index f3478d16ff..29f78c4885 100644
--- a/www/scripts/apps/admin/fields/collections/dcFields.js
+++ b/www/scripts/apps/admin/fields/collections/dcFields.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "underscore",
     "backbone",
diff --git a/www/scripts/apps/admin/fields/collections/fields.js b/www/scripts/apps/admin/fields/collections/fields.js
index 3ede7855c4..b472035fb3 100644
--- a/www/scripts/apps/admin/fields/collections/fields.js
+++ b/www/scripts/apps/admin/fields/collections/fields.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "underscore",
     "backbone",
diff --git a/www/scripts/apps/admin/fields/collections/vocabularies.js b/www/scripts/apps/admin/fields/collections/vocabularies.js
index 290348ce41..75a6afe6ec 100644
--- a/www/scripts/apps/admin/fields/collections/vocabularies.js
+++ b/www/scripts/apps/admin/fields/collections/vocabularies.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "underscore",
     "backbone",
diff --git a/www/scripts/apps/admin/fields/errors/error.js b/www/scripts/apps/admin/fields/errors/error.js
index 97d234a5ce..1e8b734978 100644
--- a/www/scripts/apps/admin/fields/errors/error.js
+++ b/www/scripts/apps/admin/fields/errors/error.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore"
diff --git a/www/scripts/apps/admin/fields/errors/errorManager.js b/www/scripts/apps/admin/fields/errors/errorManager.js
index aea7bc4067..d87a636db0 100644
--- a/www/scripts/apps/admin/fields/errors/errorManager.js
+++ b/www/scripts/apps/admin/fields/errors/errorManager.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
diff --git a/www/scripts/apps/admin/fields/errors/errorModel.js b/www/scripts/apps/admin/fields/errors/errorModel.js
index ebe1399f73..50e5108e52 100644
--- a/www/scripts/apps/admin/fields/errors/errorModel.js
+++ b/www/scripts/apps/admin/fields/errors/errorModel.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore"
diff --git a/www/scripts/apps/admin/fields/main.js b/www/scripts/apps/admin/fields/main.js
index f97be950bf..fbf125aeb1 100644
--- a/www/scripts/apps/admin/fields/main.js
+++ b/www/scripts/apps/admin/fields/main.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 // configure AMD loading
 require.config({
     baseUrl: "/scripts",
diff --git a/www/scripts/apps/admin/fields/views.js b/www/scripts/apps/admin/fields/views.js
index c180e31a22..eff28845bb 100644
--- a/www/scripts/apps/admin/fields/views.js
+++ b/www/scripts/apps/admin/fields/views.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
diff --git a/www/scripts/apps/admin/fields/views/alert.js b/www/scripts/apps/admin/fields/views/alert.js
index 1f46e44898..f075b1e098 100644
--- a/www/scripts/apps/admin/fields/views/alert.js
+++ b/www/scripts/apps/admin/fields/views/alert.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
diff --git a/www/scripts/apps/admin/fields/views/create.js b/www/scripts/apps/admin/fields/views/create.js
index 99c93b0715..ad5d2d19c3 100644
--- a/www/scripts/apps/admin/fields/views/create.js
+++ b/www/scripts/apps/admin/fields/views/create.js
@@ -1,10 +1,19 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
     "backbone",
     "i18n",
     "bootstrap",
-    "apps/admin/fields/views/create",
+    "apps/admin/fields/views/alert",
     "models/field"
 ], function($, _, Backbone, i18n, bootstrap, AlertView, FieldModel) {
     var CreateView = Backbone.View.extend({
@@ -105,18 +114,18 @@ define([
 
             field.save(null, {
                 success: function(field, response, options) {
-                    if (response.success) {
-                        AdminFieldApp.fieldsCollection.add(field);
-                        _.last(self.itemViews).clickAction().animate();
-                    }
+                    AdminFieldApp.fieldsCollection.add(field);
+                    _.last(AdminFieldApp.fieldListView.itemViews).clickAction().animate();
 
-                    new AlertView({
-                        alert: response.success ? "success" : "error", message: response.message
+                   new AlertView({alert: "info", message: i18n.t("created_success", {
+                            postProcess: "sprintf",
+                            sprintf: [field.get("name")]
+                        })
                     }).render();
                 },
-                error: function(model, xhr, options) {
+                error: function(xhr, textStatus, errorThrown) {
                     new AlertView({
-                        alert: "error", message: i18n.t("something_wrong")}
+                        alert: "error", message: '' !== xhr.responseText ? xhr.responseText : i18n.t("something_wrong")}
                     ).render();
 
                     self.toggleCreateFormAction();
diff --git a/www/scripts/apps/admin/fields/views/dcField.js b/www/scripts/apps/admin/fields/views/dcField.js
index 69cbe490f9..369309ed31 100644
--- a/www/scripts/apps/admin/fields/views/dcField.js
+++ b/www/scripts/apps/admin/fields/views/dcField.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
@@ -17,7 +26,7 @@ define([
             });
 
             this.$el.html(template);
-            
+
             var index = $("#dces-element", this.$el)[0].selectedIndex - 1;
             if (index > 0 ) {
                 $(".dces-help-block", AdminFieldApp.$rightBlock).html(
diff --git a/www/scripts/apps/admin/fields/views/edit.js b/www/scripts/apps/admin/fields/views/edit.js
index 9eca7271e3..1b3adc2200 100644
--- a/www/scripts/apps/admin/fields/views/edit.js
+++ b/www/scripts/apps/admin/fields/views/edit.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
@@ -64,31 +73,6 @@ define([
                     var fieldTagId = fieldTag.attr("id");
                     var fieldTagValue = fieldTag.val();
 
-                    // check for format tag
-                    if ("" !== fieldTagValue && false === /[a-z]+:[a-z0-9]+/i.test(fieldTagValue)) {
-                        fieldTag
-                            .closest(".control-group")
-                            .addClass("error")
-                            .find(".help-block")
-                            .empty()
-                            .append(i18n.t("validation_tag_invalid"));
-                        // add error
-                        AdminFieldApp.errorManager.addModelFieldError(new Error(
-                            self.model, fieldTagId, i18n.t("validation_tag_invalid")
-                        ));
-                    } else if (fieldTag.closest(".control-group").hasClass("error")) {
-                        // remove error
-                        AdminFieldApp.errorManager.removeModelFieldError(
-                            self.model, fieldTagId
-                        );
-
-                        fieldTag
-                            .closest(".control-group")
-                            .removeClass("error")
-                            .find(".help-block")
-                            .empty();
-                    }
-
                     var data = {};
                     data[fieldTagId] = fieldTagValue;
                     self.model.set(data);
@@ -109,6 +93,7 @@ define([
             "click .delete-field": "deleteAction",
             "keyup #name": "changeNameAction",
             "focusout input[type=text]": "fieldChangedAction",
+            "focusout input#tag": "tagFieldChangedAction",
             "change input[type=checkbox]": "fieldChangedAction",
             "change select": "selectionChangedAction"
         },
@@ -170,6 +155,38 @@ define([
 
             return this;
         },
+        tagFieldChangedAction: function(e) {
+            var fieldTag = $(e.target);
+            var fieldTagId = fieldTag.attr("id");
+            var fieldTagValue = fieldTag.val();
+
+            // check for format tag
+            if ("" !== fieldTagValue && false === /[a-z]+:[a-z0-9]+/i.test(fieldTagValue)) {
+                fieldTag
+                    .closest(".control-group")
+                    .addClass("error")
+                    .find(".help-block")
+                    .empty()
+                    .append(i18n.t("validation_tag_invalid"));
+                // add error
+                AdminFieldApp.errorManager.addModelFieldError(new Error(
+                    this.model, fieldTagId, i18n.t("validation_tag_invalid")
+                ));
+            } else if (fieldTag.closest(".control-group").hasClass("error")) {
+                // remove error
+                AdminFieldApp.errorManager.removeModelFieldError(
+                    this.model, fieldTagId
+                );
+
+                fieldTag
+                    .closest(".control-group")
+                    .removeClass("error")
+                    .find(".help-block")
+                    .empty();
+            }
+
+            this.fieldChangedAction(e);
+        },
         deleteAction: function() {
             var self = this;
             var modalView = new ModalView({
@@ -200,9 +217,9 @@ define([
                             })
                         }).render();
                     },
-                    error: function(model, xhr) {
+                    error: function(xhr, textStatus, errorThrown) {
                         new AlertView({
-                            alert: "error", message: i18n.t("something_wrong")
+                            alert: "error", message: '' !== xhr.responseText ? xhr.responseText : i18n.t("something_wrong")
                         }).render();
                     }
                 });
@@ -213,12 +230,13 @@ define([
         _onModelChange: function() {
             AdminFieldApp.fieldListView.collection.remove(this.model, {silent: true});
             AdminFieldApp.fieldListView.collection.add(this.model);
-
             var index = AdminFieldApp.fieldListView.collection.indexOf(this.model);
 
             this._selectModelView(index);
 
             this.render();
+
+            AdminFieldApp.saveView.updateStateButton();
         },
         // select temView by index in itemList
         _selectModelView: function(index) {
diff --git a/www/scripts/apps/admin/fields/views/fieldError.js b/www/scripts/apps/admin/fields/views/fieldError.js
index 38137523a8..bfa6dcc3be 100644
--- a/www/scripts/apps/admin/fields/views/fieldError.js
+++ b/www/scripts/apps/admin/fields/views/fieldError.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
diff --git a/www/scripts/apps/admin/fields/views/list.js b/www/scripts/apps/admin/fields/views/list.js
index 4605bb7ec5..0767d781f6 100644
--- a/www/scripts/apps/admin/fields/views/list.js
+++ b/www/scripts/apps/admin/fields/views/list.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "jqueryui",
@@ -85,7 +94,6 @@ define([
                 placeholder: "item-list-placeholder",
                 start: function(event, ui) {
                     ui.item.addClass("border-bottom");
-
                 },
                 stop: function(event, ui) {
                     ui.firstItemPosition = $("li:first", $(this).sortable('widget')).position().top;
@@ -105,18 +113,18 @@ define([
             return this;
         },
         updateSortAction: function(event, model, ui) {
-            var position = ui.item.index();
-            this.collection.remove(model, {silent: true});
+            var newPosition = ui.item.index();
+            var curPosition = this.collection.indexOf(model);
 
             // reorder all collection model
-            this.collection.each(function(model, index) {
-                var ordinal = index;
-                if (index >= position) ordinal += 1;
-                model.set("sorter", ordinal);
+            this.collection.each(function(el, index) {
+                if (newPosition > curPosition && (index > curPosition && index <= curPosition)) index -= 1;
+                else if (newPosition < curPosition && (index >= curPosition && index < curPosition)) index += 1;
+
+                el.set("sorter", index);
             });
 
-            model.set("sorter", position);
-            this.collection.add(model, {at: position});
+            this.render();
 
             this.itemViews[0].animate(Math.abs(ui.firstItemPosition));
 
@@ -125,6 +133,8 @@ define([
                 return el.get("id") === AdminFieldApp.fieldEditView.model.get("id");
             });
 
+            AdminFieldApp.saveView.updateStateButton();
+
             return this;
         }
     }));
diff --git a/www/scripts/apps/admin/fields/views/listRow.js b/www/scripts/apps/admin/fields/views/listRow.js
index 1bec7d2a00..e8c76da3d7 100644
--- a/www/scripts/apps/admin/fields/views/listRow.js
+++ b/www/scripts/apps/admin/fields/views/listRow.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
diff --git a/www/scripts/apps/admin/fields/views/modal.js b/www/scripts/apps/admin/fields/views/modal.js
index d6fc73b99a..49e503e7e5 100644
--- a/www/scripts/apps/admin/fields/views/modal.js
+++ b/www/scripts/apps/admin/fields/views/modal.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
diff --git a/www/scripts/apps/admin/fields/views/save.js b/www/scripts/apps/admin/fields/views/save.js
index bf993075d4..6645f123f1 100644
--- a/www/scripts/apps/admin/fields/views/save.js
+++ b/www/scripts/apps/admin/fields/views/save.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "jquery",
     "underscore",
@@ -29,20 +38,18 @@ define([
             if (this._isModelDesync()) {
                 this._loadingState(true);
                 AdminFieldApp.fieldsCollection.save({
-                    success: function(response) {
+                    success: function(fields) {
                         // reset collection with new one
-                        if (response.success) {
-                            AdminFieldApp.fieldsCollection.reset(response.fields);
-                        }
+                        AdminFieldApp.fieldsCollection.reset(fields);
 
                         new AlertView({
-                            alert: response.success ? "success" : "error",
-                            message: response.messages.join("<br />")
+                            alert: "success",
+                            message: i18n.t("fields_save")
                         }).render();
                     },
-                    error: function(model, xhr, options) {
+                    error: function(xhr, textStatus, errorThrown) {
                         new AlertView({
-                            alert: "error", message: i18n.t("something_wrong")
+                            alert: "error", message: '' !== xhr.responseText ? xhr.responseText : i18n.t("something_wrong")
                         }).render();
                     }
                 }).done(function() {
@@ -55,9 +62,13 @@ define([
         render: function () {
             var template = _.template($("#save_template").html());
             this.$el.html(template);
+            this.updateStateButton();
 
             return this;
         },
+        updateStateButton: function() {
+            this._disableSaveButton(!this._isModelDesync());
+        },
         // check whether model has changed or not
         _isModelDesync: function () {
             return "undefined" !== typeof AdminFieldApp.fieldsCollection.find(function(model) {
@@ -86,7 +97,7 @@ define([
                 $(".save-block", AdminFieldApp.$top).removeClass("loading");
             }
 
-            this._disableSaveButton(active);
+            this.updateStateButton();
             this._overlay(active);
         }
     });
diff --git a/www/scripts/models/dcField.js b/www/scripts/models/dcField.js
index 8c60b959cc..65cec8e6b6 100644
--- a/www/scripts/models/dcField.js
+++ b/www/scripts/models/dcField.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "underscore",
     "backbone"
diff --git a/www/scripts/models/field.js b/www/scripts/models/field.js
index 55e2c847a7..84a746f5f1 100644
--- a/www/scripts/models/field.js
+++ b/www/scripts/models/field.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "underscore",
     "backbone"
diff --git a/www/scripts/models/vocabulary.js b/www/scripts/models/vocabulary.js
index 1eb31e0bd1..e681dc98b5 100644
--- a/www/scripts/models/vocabulary.js
+++ b/www/scripts/models/vocabulary.js
@@ -1,3 +1,12 @@
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 define([
     "underscore",
     "backbone"
diff --git a/www/scripts/tests/fixtures/admin/fields/dom b/www/scripts/tests/fixtures/admin/fields/dom
index 1e549a64b9..f7f354628f 100644
--- a/www/scripts/tests/fixtures/admin/fields/dom
+++ b/www/scripts/tests/fixtures/admin/fields/dom
@@ -15,4 +15,4 @@
         <div class="left-block span4"></div>
         <div class="right-block span8"></div>
     </div>
-</div>
\ No newline at end of file
+</div>
diff --git a/www/scripts/tests/specs/admin/fields.js b/www/scripts/tests/specs/admin/fields.js
index 2869f0bbd5..9824b523a8 100644
--- a/www/scripts/tests/specs/admin/fields.js
+++ b/www/scripts/tests/specs/admin/fields.js
@@ -287,6 +287,14 @@ define([
                 AdminFieldApp.fieldListView.render();
             });
 
+            it("should update collection when model change", function() {
+                AdminFieldApp.fieldListView.itemViews[0].clickAction();
+                AdminFieldApp.fieldEditView.model.set({
+                    "name": "new name"
+                });
+                assert.equal(AdminFieldApp.fieldListView.itemViews[0].model.get('name'), "new name", 'model is updated');
+            });
+
             it("should update edit view when clicking on single element", function() {
                 AdminFieldApp.fieldListView.itemViews[0].clickAction();
                 should.exist(AdminFieldApp.fieldEditView);
@@ -296,15 +304,7 @@ define([
             it("should reorder collection on drop action", function() {
                 var ui = {item: {index: function() {return 2;}}};
                 AdminFieldApp.fieldListView.itemViews[0].dropAction({},ui);
-                assert.equal(AdminFieldApp.fieldListView.collection.last().get('sorter'), 2, 'model is updated');
-            });
-
-            it("should update collection when model change", function() {
-                AdminFieldApp.fieldListView.itemViews[0].clickAction();
-                AdminFieldApp.fieldEditView.model.set({
-                    "name": "new name"
-                });
-                assert.equal(AdminFieldApp.fieldListView.collection.first().get('name'), "new name", 'model is updated');
+                assert.equal(AdminFieldApp.fieldListView.collection.last().get('sorter'), 3, 'model is updated');
             });
         });
     });