diff --git a/lib/workflow/workflowtrigger.inc.php b/lib/workflow/workflowtrigger.inc.php
new file mode 100644
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+++ b/lib/workflow/workflowtrigger.inc.php
@@ -0,0 +1,98 @@
+<?php
+/**
+ * $Id: workflowtrigger.inc.php 5268 2006-04-18 13:42:22Z nbm $
+ *
+ * Provides a base class for workflow triggers.  This includes
+ * the ability to serialise configuration arrays into the db
+ * and to be restored.
+ *
+ * This class will be subclassed - any configuration that is performed
+ * should be saved through the associated KTWorkflowTriggerInstance.
+ *
+ * Copyright (c) 2005 Jam Warehouse http://www.jamwarehouse.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; using version 2 of the License.
+ *
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * @version $Revision: 5268 $
+ * @author Brad Shuttleworth, Jam Warehouse (Pty) Ltd, South Africa
+ */
+
+//require_once(KT_LIB_DIR . '/workflow/workflowtriggerinstance');
+
+class KTWorkflowTrigger {
+    var $sNamespace = 'ktcore.workflowtriggers.abstractbase';
+    var $sFriendlyName;
+    var $sDescription;
+    var $oTriggerInstance;
+    var $aConfig = array();
+    
+    // generic requirements - both can be true
+    var $bIsGuard = false;
+    var $bIsAction = false;
+
+    function KTWorkflowTrigger() {
+        $this->_oTriggerState = null;  // initialise to initial state
+        $this->sFriendlyName = _kt('Base class for workflow triggers');
+        $this->sDescription = _kt('This is an abstract base class for the overall workflow trigger.  It should never actually be available for installation.');
+    }
+    
+    function loadConfig($oTriggerInstance) {
+        $this->oTriggerInstance = $oTriggerInstance;
+    }
+    
+    function isLoaded() { return (!is_null($this->oTriggerInstance)); }
+    
+    // simple function to inform the UI/registration what kind of event this is
+    function getCapabilities() {
+        return array(
+            'guard' => $this->bIsGuard,
+            'action' => $this->bIsAction,
+            'name' => $this->sFriendlyName,
+            'description' => $this->sDescription,
+        );
+    }
+    
+    // return true for transition allowed on doc, false for transition not allowed on doc.
+    function allowTransition($oDocument, $oUser) {
+        return true;  // abstract base class
+    }
+    
+    /*
+    Multiple triggers can occur on a given transition.  If this trigger fails,
+    return a PEAR::error (the overall system -will- roll the db back - 
+    no need to do it yourself) with a -useful- human error message.
+    
+    IF YOU SUCCEED, return a $aRollbackInfo array.  This will be passed
+    to $this->rollbackTransition IF NEEDED (e.g. a later trigger failed.)
+    This is to do your best to roll back any external changes (e.g. emails
+    sent.)
+     */
+    function performTransition($oDocument, $oUser) {
+        $rollbackinfo = null;
+        return $rollbackinfo;
+    }
+    
+    // roll back the transition.  $aRollbackInfo was returned by you earlier
+    // after ->performTransition.
+    // 
+    // throw a PEAR::error to -inform- users of a critical problem, NOT to 
+    // cause the system to rollback (that's already happened.)
+    function rollbackTransition($oDocument, $oUser, $aRollbackInfo = null) {
+        return true;
+        // return PEAR::raiseError(_kt('A follow-up email has been sent, informing the previous recipient that the step was cancelled.'));
+    }
+}
+
+?>