diff --git a/app/Model/AppModel.php b/app/Model/AppModel.php
index ca15de680..2dd91c9d4 100644
--- a/app/Model/AppModel.php
+++ b/app/Model/AppModel.php
@@ -69,7 +69,8 @@ class AppModel extends Model
     public $db_changes = array(
         1 => false, 2 => false, 3 => false, 4 => true, 5 => false, 6 => false,
         7 => false, 8 => false, 9 => false, 10 => false, 11 => false, 12 => false,
-        13 => false, 14 => false, 15 => false, 18 => false, 19 => false, 20 => false
+        13 => false, 14 => false, 15 => false, 18 => false, 19 => false, 20 => false, 
+	21 => false
     );
 
     public function afterSave($created, $options = array())
@@ -1031,9 +1032,14 @@ class AppModel extends Model
             case 19:
                 $sqlArray[] = 'ALTER TABLE `taxonomies` ADD COLUMN exclusive tinyint(1) DEFAULT 0;';
                 break;
-			case 20:
-				$sqlArray[] = "ALTER TABLE `servers` ADD `skip_proxy` tinyint(1) NOT NULL DEFAULT 0;";
-				break;
+            case 20:
+                $sqlArray[] = "ALTER TABLE `servers` ADD `skip_proxy` tinyint(1) NOT NULL DEFAULT 0;";
+                break;
+            case 21:
+                $sqlArray[] = 'ALTER TABLE `tags` ADD COLUMN numerical_value int(11) NULL;';
+                $sqlArray[] = 'ALTER TABLE `taxonomy_predicates` ADD COLUMN numerical_value int(11) NULL;';
+                $sqlArray[] = 'ALTER TABLE `taxonomy_entries` ADD COLUMN numerical_value int(11) NULL;';
+                break;
             case 'fixNonEmptySharingGroupID':
                 $sqlArray[] = 'UPDATE `events` SET `sharing_group_id` = 0 WHERE `distribution` != 4;';
                 $sqlArray[] = 'UPDATE `attributes` SET `sharing_group_id` = 0 WHERE `distribution` != 4;';
diff --git a/app/Model/Attribute.php b/app/Model/Attribute.php
index b4efa3910..193129216 100644
--- a/app/Model/Attribute.php
+++ b/app/Model/Attribute.php
@@ -2453,6 +2453,9 @@ class Attribute extends AppModel
     // array 1 will have all of the non negated terms and array 2 all the negated terms
     public function dissectArgs($args)
     {
+		if (empty($args)) {
+			return array(0 => array(), 1 => array());
+		}
         if (!is_array($args)) {
             $args = explode('&&', $args);
         }
diff --git a/app/Model/Module.php b/app/Model/Module.php
index 7c1025adb..8bb8297b4 100644
--- a/app/Model/Module.php
+++ b/app/Model/Module.php
@@ -215,6 +215,7 @@ class Module extends AppModel
         );
         if ($moduleFamily == 'Cortex') {
             if (!empty(Configure::read('Plugin.' . $moduleFamily . '_authkey'))) {
+				unset($request['header']['Content-Type']);
                 $request['header']['Authorization'] = 'Bearer ' . Configure::read('Plugin.' . $moduleFamily . '_authkey');
             }
         }
diff --git a/app/Model/Taxonomy.php b/app/Model/Taxonomy.php
index 24f534a72..50dde6a18 100644
--- a/app/Model/Taxonomy.php
+++ b/app/Model/Taxonomy.php
@@ -147,6 +147,9 @@ class Taxonomy extends AppModel
                     if (isset($entry['colour']) && !empty($entry['colour'])) {
                         $temp['colour'] = $entry['colour'];
                     }
+					if (isset($entry['numerical_value']) && $entry['numerical_value'] !== null) {
+						$temp['numerical_value'] = $entry['numerical_value'];
+					}
                     $entries[] = $temp;
                 }
             } else {
@@ -155,6 +158,9 @@ class Taxonomy extends AppModel
                 if (isset($predicate['colour']) && !empty($predicate['colour'])) {
                     $temp['colour'] = $predicate['colour'];
                 }
+				if (isset($predicate['numerical_value']) && $predicate['numerical_value'] !== null) {
+					$temp['numerical_value'] = $predicate['numerical_value'];
+				}
                 $entries[] = $temp;
             }
         }
@@ -267,13 +273,20 @@ class Taxonomy extends AppModel
         foreach ($taxonomy['entries'] as $k => $entry) {
             if (isset($tags[strtoupper($entry['tag'])])) {
                 $temp = $tags[strtoupper($entry['tag'])];
-                if ((in_array('colour', $skipUpdateFields) && $temp['Tag']['colour'] != $colours[$k]) || (in_array('name', $skipUpdateFields) && $temp['Tag']['name'] !== $entry['tag'])) {
+                if (
+					(!in_array('colour', $skipUpdateFields) && $temp['Tag']['colour'] != $colours[$k]) ||
+					(!in_array('name', $skipUpdateFields) && $temp['Tag']['name'] !== $entry['tag']) ||
+					(!in_array('numerical_value', $skipUpdateFields) && isset($entry['numerical_value']) && isset($temp['Tag']['numerical_value']) && $temp['Tag']['numerical_value'] !== $entry['numerical_value'])
+				) {
                     if (!in_array('colour', $skipUpdateFields)) {
                         $temp['Tag']['colour'] = (isset($entry['colour']) && !empty($entry['colour'])) ? $entry['colour'] : $colours[$k];
                     }
                     if (!in_array('name', $skipUpdateFields)) {
                         $temp['Tag']['name'] = $entry['tag'];
                     }
+					if (!in_array('numerical_value', $skipUpdateFields)) {
+						$temp['Tag']['numerical_value'] = $entry['numerical_value'];
+					}
                     $this->Tag->save($temp['Tag']);
                 }
             }
diff --git a/app/View/Taxonomies/view.ctp b/app/View/Taxonomies/view.ctp
index 7bb39836c..e3b9f8cd9 100644
--- a/app/View/Taxonomies/view.ctp
+++ b/app/View/Taxonomies/view.ctp
@@ -72,6 +72,7 @@
                 <?php endif;?>
                     <th><?php echo $this->Paginator->sort('tag');?></th>
                     <th><?php echo $this->Paginator->sort('expanded');?></th>
+					<th><?php echo $this->Paginator->sort('numerical_value');?></th>
                     <th><?php echo $this->Paginator->sort('events');?></th>
                     <th><?php echo $this->Paginator->sort('attributes');?></th>
                     <th><?php echo $this->Paginator->sort('tag');?></th>
@@ -86,6 +87,7 @@
             <?php endif; ?>
                 <td id="tag_<?php echo h($k); ?>" class="short"><?php echo h($item['tag']); ?></td>
                 <td><?php echo h($item['expanded']); ?>&nbsp;</td>
+				<td class="short"><?php echo isset($item['numerical_value']) ? h($item['numerical_value']) : ''; ?>&nbsp;</td>
                 <td class="short">
                 <?php
                     if ($item['existing_tag']) {