--- a/Model/Document.php	Fri Dec 09 06:43:49 2011 +0100
+++ b/Model/Document.php	Wed Dec 14 23:28:57 2011 +0100
@@ -26,7 +26,7 @@
     protected $manualOrder = false;
     
     /**
-     * @var string $externalId
+     * @var mixed $externalId
      */
     protected $externalId;