diff --git a/README.md b/README.md
index c00d8324a..c5d2c0a46 100644
--- a/README.md
+++ b/README.md
@@ -2,31 +2,141 @@
 
 # Rougail
 
-Created by:
-EOLE (http://eole.orion.education.fr)
-Copyright (C) 2005-2018
+## Description
 
-Forked by:
-Cadoles (http://www.cadoles.com)
-Copyright (C) 2019-2021
+Rougail is a free full-featured configuration manager library written in python3.
 
-Silique (https://www.silique.fr)
-Copyright (C) 2022
+The configuration is describe in YAML ou XML dictionary files.
 
-distribued with GPL-2 or later license
+Those dictionaries are converted into [Tiramisu](https://framagit.org/tiramisu/tiramisu) objects and can generates configuration files with template written in [Cheetah](https://cheetahtemplate.org/) or [Jinja](https://jinja.palletsprojects.com/).
 
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+Rougail can be incorporated with other technologies and stacks regardless of whether they’re written in Python or not.
 
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+## Simple example
 
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+Create directories:
 
-[Documentation (french)](doc/README.md)
+```bash
+# mkdir dict tmpl tmp dest
+```
+
+### Dictionary
+
+A dictionary is a services and a variables description file.
+
+Create the file `dict/dictionary.yml`:
+
+```yml
+version: '0.10'
+
+# describe a first service with a single file
+services:
+- service:
+    - name: my_service
+      file:
+      - engine: jinja2
+        text: /etc/filename
+
+# describe a variable my_first_variable
+# and a family with a variable my_second_variable
+variables:
+- variable:
+    name: my_first_variable
+    value:
+    - text: my_value
+- family:
+    name: my_family
+    variables:
+    - variable:
+        name: my_second_variable
+        type: number
+        mandatory: true
+        value:
+        - text: 1
+```
+
+### Template
+
+Create a [Jinja](https://jinja.palletsprojects.com/) template `tmpl/filename`:
+
+```
+My first value: {{ my_first_variable }}
+My second value: {{ my_second_variable }}
+```
+
+### Generate template
+
+#### With default value:
+
+Here is a python3 example file:
+
+```python
+from rougail import Rougail, RougailConfig
+from asyncio import run
+
+async def main():
+    RougailConfig['dictionaries_dir'] = ['dict']
+    RougailConfig['templates_dir'] = ['tmpl']
+    RougailConfig['tmp_dir'] = 'tmp'
+    RougailConfig['destinations_dir'] = 'dest'
+    rougail = Rougail()
+    await rougail.template()
+
+
+run(main())
+```
+
+The destination file is generated:
+
+```bash
+# cat dest/etc/filename
+My first value: my_value
+My second value: 1
+```
+
+#### With modified value
+
+Remove old generated file:
+
+```bash
+# rm -f dest/etc/filename
+```
+
+Use [Tiramisu](https://framagit.org/tiramisu/tiramisu) API to change values:
+
+```python
+from rougail import Rougail, RougailConfig
+from asyncio import run
+
+async def main():
+    RougailConfig['dictionaries_dir'] = ['dict']
+    RougailConfig['templates_dir'] = ['tmpl']
+    RougailConfig['tmp_dir'] = 'tmp'
+    RougailConfig['destinations_dir'] = 'dest'
+    rougail = Rougail()
+    config = await rougail.get_config()
+    await config.option('rougail.my_first_variable').value.set('modified_value')
+    await config.option('rougail.my_family.my_second_variable').value.set(2)
+    await rougail.template()
+
+
+run(main())
+```
+
+The destination file is generated with new values:
+
+```bash
+# cat dest/etc/filename
+My first value: modified_value
+My second value: 2
+```
+
+# Link
+
+* [Documentation (french)](doc/README.md)
+* [Licence ](LICENSE)
+
+# Related projects
+
+* [Tiramisu](https://framagit.org/tiramisu/tiramisu)
+* [Risotto](https://cloud.silique.fr/gitea/risotto/risotto)
diff --git a/doc/variable/README.md b/doc/variable/README.md
index 3bab54f21..a2b7d7cb0 100644
--- a/doc/variable/README.md
+++ b/doc/variable/README.md
@@ -137,7 +137,7 @@ En YAML :
 - variable:
     name: my_variable
     multi: true
-	unique: false
+    unique: false
 ```
 
 ## Variable invisible
diff --git a/logo.svg b/logo.svg
index df920a83f..14da07da2 100644
--- a/logo.svg
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