--- a/src/source/developerguide.rst	Fri Apr 20 16:52:49 2018 +0200
+++ b/src/source/developerguide.rst	Fri Apr 27 11:51:08 2018 +0200
@@ -1,31 +1,14 @@
 .. _developerguide:
 
 
-PyAMS Developer's Guide
-=======================
+Developer's Guide
+=================
 
-PyAMS package are developed based on ZCA
-
-
-
-.. seealso::
+PyAMS packages are developed based on ZCA
 
 
-Interfaces
-----------
-
-Interfaces are objects that specify (document) the external behavior
-of objects that "provide" them.  An interface specifies behavior
-through:
-
-- Informal documentation in a doc string
+.. toctree::
+   :maxdepth: 2
 
-- Attribute definitions
-
-- Invariants, which are conditions that must hold for objects that
-  provide the interface
-
-Attribute definitions specify specific attributes. They define the
-attribute name and provide documentation and constraints of attribute
-values.  Attribute definitions can take a number of forms, as we'll
-
+   zca
+   extend