diff --git a/sources/Application/DataModel/TriggerAndAction/Trigger.php b/sources/Application/DataModel/TriggerAndAction/Trigger.php
new file mode 100644
index 000000000..4bb292fd7
--- /dev/null
+++ b/sources/Application/DataModel/TriggerAndAction/Trigger.php
@@ -0,0 +1,137 @@
+<?php
+
+/**
+ * A user defined trigger, to customize the application
+ * A trigger will activate an action
+ *
+ * @package     iTopORM
+ */
+abstract class Trigger extends cmdbAbstractObject
+{
+    /**
+     * @throws \CoreException
+     * @throws \Exception
+     */
+    public static function Init()
+    {
+        $aParams = array
+        (
+            "category" => "grant_by_profile,core/cmdb",
+            "key_type" => "autoincrement",
+            "name_attcode" => "description",
+            "complementary_name_attcode" => ['finalclass', 'complement'],
+            "state_attcode" => "",
+            "reconc_keys" => ['description'],
+            "db_table" => "priv_trigger",
+            "db_key_field" => "id",
+            "db_finalclass_field" => "realclass",
+            'style' => new ormStyle(null, null, null, null, null, '../images/icons/icons8-conflict.svg'),
+        );
+        MetaModel::Init_Params($aParams);
+        //MetaModel::Init_InheritAttributes();
+        MetaModel::Init_AddAttribute(new AttributeString("description", array("allowed_values" => null, "sql" => "description", "default_value" => null, "is_null_allowed" => false, "depends_on" => array())));
+        MetaModel::Init_AddAttribute(new AttributeLinkedSetIndirect("action_list",
+            array("linked_class" => "lnkTriggerAction", "ext_key_to_me" => "trigger_id", "ext_key_to_remote" => "action_id", "allowed_values" => null, "count_min" => 1, "count_max" => 0, "depends_on" => array())));
+        $aTags = ContextTag::GetTags();
+        MetaModel::Init_AddAttribute(new AttributeEnumSet("context", array("allowed_values" => null, "possible_values" => new ValueSetEnumPadded($aTags, true), "sql" => "context", "depends_on" => array(), "is_null_allowed" => true, "max_items" => 12)));
+        // "complement" is a computed field, fed by Trigger sub-classes, in general in ComputeValues method, for eg. the TriggerOnObject fed it with target_class info
+        MetaModel::Init_AddAttribute(new AttributeString("complement", array("allowed_values" => null, "sql" => "complement", "default_value" => null, "is_null_allowed" => true, "depends_on" => array())));
+        MetaModel::Init_AddAttribute(new AttributeEnum("subscription_policy", array("allowed_values" => new ValueSetEnum(Combodo\iTop\Core\Trigger\Enum\SubscriptionPolicy::cases()), "sql" => "subscription_policy", "default_value" => \Combodo\iTop\Core\Trigger\Enum\SubscriptionPolicy::AllowNoChannel->value, "is_null_allowed" => false, "depends_on" => array())));
+
+        // Display lists
+        MetaModel::Init_SetZListItems('details', array('finalclass', 'description', 'context', 'subscription_policy', 'action_list', 'complement')); // Attributes to be displayed for the complete details
+        MetaModel::Init_SetZListItems('list', array('finalclass', 'complement')); // Attributes to be displayed for a list
+        // Search criteria
+        //		MetaModel::Init_SetZListItems('standard_search', array('name')); // Criteria of the std search form
+        //		MetaModel::Init_SetZListItems('advanced_search', array('name')); // Criteria of the advanced search form
+    }
+
+    /**
+     * Check if the trigger can be used in the current context
+     *
+     * @return bool true if context OK
+     * @throws \ArchivedObjectException
+     * @throws \CoreException
+     */
+    public function IsContextValid()
+    {
+        // Check the context
+        $oContext = $this->Get('context');
+        $bChecked = false;
+        $bValid = false;
+        foreach ($oContext->GetValues() as $sValue) {
+            $bChecked = true;
+            if (ContextTag::Check($sValue)) {
+                $bValid = true;
+                break;
+            }
+        }
+        if ($bChecked && !$bValid) {
+            // Trigger does not match the current context
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * @param $aContextArgs
+     *
+     * @throws \ArchivedObjectException
+     * @throws \CoreException
+     */
+    public function DoActivate($aContextArgs)
+    {
+        // Check the context
+        if (!$this->IsContextValid()) {
+            // Trigger does not match the current context
+            $sClass = get_class($this);
+            $sName = $this->Get('friendlyname');
+            IssueLog::Debug("Context NOT valid for : {$sClass} '$sName'");
+            return;
+        }
+
+        $aContextArgs['trigger->object()'] = $this;
+
+        // Find the related actions
+        $oLinkedActions = $this->Get('action_list');
+
+        // Order actions as expected
+        $aActionListOrdered = [];
+        while ($oLink = $oLinkedActions->Fetch()) {
+            $aActionListOrdered[(int)$oLink->Get('order')][] = $oLink;
+        }
+        ksort($aActionListOrdered);
+
+        // Execute actions
+        foreach ($aActionListOrdered as $aActionSubList) {
+            foreach ($aActionSubList as $oLink) /** @var \DBObject $oLink */ {
+                /** @var \DBObject $oLink */
+                $iActionId = $oLink->Get('action_id');
+                /** @var \Action $oAction */
+                $oAction = MetaModel::GetObject('Action', $iActionId);
+                if ($oAction->IsActive()) {
+                    $oKPI = new ExecutionKPI();
+                    $aContextArgs['action->object()'] = $oAction;
+                    $oAction->DoExecute($this, $aContextArgs);
+                    $oKPI->ComputeStatsForExtension($oAction, 'DoExecute');
+                }
+            }
+        }
+    }
+
+    /**
+     * Check whether the given object is in the scope of this trigger
+     * and can potentially be the subject of notifications
+     *
+     * @param DBObject $oObject The object to check
+     *
+     * @return bool
+     */
+    public function IsInScope(DBObject $oObject)
+    {
+        // By default the answer is no
+        // Overload this function in your own derived class for a different behavior
+        return false;
+    }
+}
\ No newline at end of file