--- a/src/pyams_workflow/interfaces.py	Fri Jan 18 15:40:15 2019 +0100
+++ b/src/pyams_workflow/interfaces.py	Thu May 23 16:47:00 2019 +0200
@@ -170,6 +170,9 @@
     retired_states = Set(title="Retired states",
                          description="States of contents which are retired but not yet archived")
 
+    archived_states = Set(title="Archived states",
+                          description="States of contents which are archived and can't be updated anymore")
+
     auto_retired_state = Attribute("Auto-retired state")
 
     def initialize(self):