+:class:`Threads` -- Threads iterator
+------------------------------------
+
+To be implemented
+
+:class:`Thread` -- A single thread
+------------------------------------
+
+To be implemented
+
+:class:`Filenames` -- An iterator over filenames
+------------------------------------------------
+
+To be implemented
+
+:class:`Directoy` -- A directory entry in the database
+------------------------------------------------------
+
+To be implemented
+