diff -r d2fba1e3b94b -r 21fab44f46fe Event/WikiTagEvents.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Event/WikiTagEvents.php	Thu Nov 17 11:29:26 2011 +0100
@@ -0,0 +1,20 @@
+<?php
+/*
+ * This file is part of the WikiTagBundle package.
+ *
+ * (c) IRI <http://www.iri.centrepompidou.fr/>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace IRI\Bundle\WikiTagBundle\Event;
+
+final class WikiTagEvents
+{
+    /**
+     * the wikitag.tag_change events is thrown each time the tag list of a document is modified.
+     * @var string
+     */
+    const onTagChanged = 'wikitag.tag_changed';
+
+}
\ No newline at end of file