Update README

README.rst

@@ -56,7 +56,7 @@
 ---------------------------
 
 You cannot delete analytic codes that are referenced by objects.
-Moreover, you cannot delete objects that reference analytic codes that are referenced elsewhere.
+The goal of this constraint is to ensure the integrity of your analyses.
 
 .. _ConfigureAnalyticFields:
 
@@ -81,8 +81,6 @@
 translate (False): enable or disable the translation of field values on
 analytic dimensions (name) and codes (name and description).
 
-
-
 .. _MetaAnalytic:
 
 Add the MetaAnalytic metaclass to a model
@@ -167,6 +165,46 @@
  }"/>
 
 
+Advanced: Para-analytic fields
+------------------------------
+
+Para-analytic fields are a more advanced feature of analytic_structure.
+They differ from ordinary analytics fields in two ways:
+
+- They are entirely configurable, meaning that you decide their type and parameters
+- They don't have predefined behaviors
+
+Para-analytic fields are defined in with the ``_para_analytic`` attribute.
+For each entry in ``_para_analytic`` the ``MetaAnalytic`` metaclass will create a number fields.
+The number of fields depend on ``analytic_size`` in the configuration file (see ConfigureAnalyticFields_).
+
+Each entry is key-value pair of a dict where the key is a (prefix, suffix) tuple and the value a dict containing the following:
+
+``model`` the name of the referenced dimension model (doesn't do anything special)
+``type`` a field class, the field type to use
+``default`` default value for the fields
+``args`` list of arguments to inject in ``type`` constructor
+``kwargs`` dict of keyword arguments to inject in ``type`` constructor.
+
+Here is declaration that will create fields with the names ``a1_b``, ``a2_b``, ``a3_b``, ...
+
+.. code:: python
+
+ from openerp import fields
+
+ # ...
+
+ # Inside a class
+ _para_analytic = {
+    ('a', 'b'): {
+        'model': 'account_move_line',
+        'type': fields.Boolean,
+        'default': True,
+        'args': ("field is optional"),
+        'kwargs': dict(required=True),
+    a,}
+ }
+
 Validation hook for analytic fields
 -----------------------------------