--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/exceptions.rst	Sun Jul 21 14:03:55 2013 -0500
@@ -0,0 +1,30 @@
+Exceptions
+==========
+
+The ``m209`` library defines an exception hierarchy, rooted at the
+``M209Error`` class. These exceptions are briefly described below.
+
+.. class:: m209.M209Error()
+
+   The base exception in the hierarchy. It inherits from the built in
+   Python ``Exception`` class.
+
+.. class:: m209.drum.DrumError()
+
+   Inherits from :class:`~m209.M209Error`. This is an internal exception, used
+   to report drum related errors.
+
+.. class:: m209.key_wheel.KeyWheelError()
+
+   Inherits from :class:`~m209.M209Error`. This is an internal exception, used
+   to report key wheel related errors.
+
+.. class:: m209.keylist.generate.KeyListGenError()
+
+   Inherits from :class:`~m209.M209Error`. This is public exception, used
+   to report errors during the key list generation process.
+
+.. class:: m209.procedure.ProcedureError()
+
+   Inherits from :class:`~m209.M209Error`. This is public exception, used
+   to report errors during :class:`~m209.procedure.StdProcedure` operations.