diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@ Skeleton Monarc Project
 =======================
 
 *Disclaimer: This is a work in progress and software is still in alpha stage.*
- 
+
 Introduction
 ------------
 Skeleton Monarc Project.
@@ -33,6 +33,7 @@ Alternately, clone the repository and manually invoke `composer` using the shipp
 (The `self-update` directive is to ensure you have an up-to-date `composer.phar`
 available.)
 
+![Arbo](public/img/arbo1.png "Arbo")
 
 Databases
 ---------
@@ -44,10 +45,20 @@ Create 2 databases:
 Change Sql Mode in my.cnf:
 
     sql-mode = MYSQL40
- 
- 
+    
+There is 2 databases: 
+* monarc_common contain models and data create by smile.
+* monarc_master contain all user and authentication information
 Symbolics links
 ---------------
+
+The project is splited on 2 parts :
+* an Api in charge of retrieve data
+* an interface to display data
+
+The Api is not direct modules of the project but libraries.
+You must create modules with symbolics link to libraries
+
 Create 2 symbolics links at project root: 
 
     mkdir module
@@ -157,8 +168,8 @@ Play script (mandatory from the root of the project)(pull and migrations):
     
 This shell script use others shell script. May be you node to change rights of these others files
 
-Create Initial User
--------------------
+Create Initial User and Client
+------------------------------
 
 Modify email and password (firstname or lastname) of first user in /module/MonarcFO/migrations/seeds/adminUserInit.php 
 
@@ -167,6 +178,12 @@ If you have a mail server, you can keep default password and click on "Password
 Create first user:
 
     php ./vendor/robmorgan/phinx/bin/phinx seed:run -c ./module/MonarcBO/migrations/phinx.php
+    
+Data Model
+----------
+
+monarc_common
+![monarc_common](public/img/model-common.png "monarc_common")
 
 License
 -------
@@ -174,3 +191,4 @@ License
 This software is licensed under [GNU Affero General Public License version 3](http://www.gnu.org/licenses/agpl-3.0.html)
 
 Copyright (C) 2016-2017 SMILE gie securitymadein.lu
+
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