1 files changed, 9 insertions, 2 deletions
diff --git a/repoze/bfg/interfaces.py b/repoze/bfg/interfaces.py
index 711ea44cc..b6d7ff623 100644
--- a/repoze/bfg/interfaces.py
+++ b/repoze/bfg/interfaces.py
@@ -4,7 +4,14 @@ class IWSGIApplication(Interface):
     def __call__(environ, start_response):
         """ Represent a WSGI (PEP 333) application """
 
-class IPolicy(Interface):
-    def __call__(root, environ):
+class ITraversalPolicy(Interface):
+    def __call__(environ, root):
         """ Return a tuple in the form (context, name, subpath) """
         
+class ITraverser(Interface):
+    def __init__(context):
+        """ Accept a context """
+
+    def __call__(environ, name):
+        """ Return a subcontext or based on name """
+