update Whait is sib

source/import_documentation/what-is-sib.rst

@@ -13,6 +13,7 @@ Thanks to W3C and `the work of Tim Berners-Lee <https://solid.mit.edu/>`__, an a
 
 **Startin'blox has set itself the mission of precipitating the advent of this new type of digital platform.**
 
+
 To be sure to speak the same language throughout the documentation,
 you’ll find any tricky vocabulary on this graphic glossary.
 
@@ -27,12 +28,39 @@ Explanation
 Global overview
 ---------------
 
-Startin'blox is composed of a framework with basic fonctionalities like making a form, display datas, a map, a calendar etc..
+Startin'blox is composed of : 
+
+A front framework
+..................
+It can be import by a simple script in a html file and provide you basics functionalities like making a form, display datas, a map, a calendar etc..
+
+Extended features components
+............................
+Components are web components that conrespond to functionalities that you can easily add to existing applications. Startin'blox creates components according to its uses but in the future we encourage the development of community components.
+
+For example, Sib-Directory provide you a skills directory of your users.
+
+.. figure:: ../_static/images/import_documentation/Components.png
+   :alt: Component example
+
+Each components treat a specific shape of data. The validation of this shape is made on the server side.
+
+A server solution
+.................
+We offer a server solution based on the `Django framework <https://www.djangoproject.com/>`__ and adapted to be compatible with the Linked datas platform conventions, named DjangoLDP.
+
+It is a simple architecture on which we can add LDP packages, corresponding to the different components used. Those are the ones that will do the work of validating the data of the application.
+
+.. figure:: ../_static/images/import_documentation/Overview-server.png
+   :alt: Server overview
+
+.. note::
+   The federation is done on client side.
 
-On this framework you can easily add feature component like skills inventory, invoices, jobs board, chat..
+To sum up, the solution is quite simple to summarize: 
 
 .. figure:: ../_static/images/import_documentation/Overview-of-SiB.png
-   :alt: SiB Overview
+   :alt: SiB overview
     
 Overview of the Framework
 --------------------------