diff --git a/README.md b/README.md
index 6bb9378..96600f4 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,9 @@ xdrm-framework is a tool that wraps my framework and all it's component's versio
 To use the xdrm-framework's project builder, just open a linux terminal and type :
 
 1. `./xfw packages` - to display the available modules
-2. `./xfw install {packageName}:1.2` - to install a package and its version (1.2 here)
-3. `./xfw remove {packageName}` - to disable a module
-4. `./xfw build {projectRoot}` - will create your project in the folder `{projectRoot}`
+2. `./xfw install @pkg_name:1.2` - to install a package and its version (1.2 here)
+3. `./xfw remove @pkg_name` - to disable a module
+4. `./xfw build @project_root` - will create your project in the folder `@project_root`
 5. `./xfw init` - to remove all enabled modules
 
 #### 2. Project's file structure
diff --git a/notice/api/2.2.md b/notice/api/2.2.md
index 0cb93e6..0a13b24 100644
--- a/notice/api/2.2.md
+++ b/notice/api/2.2.md
@@ -66,13 +66,13 @@ The API is based over a 2-level delegation structure :
 So each of your functionalities must have a `method` name and be inside a `module`.
 
 <u>Example:</u>
-* module `article` contains methods:
-	* `read` with argument `article_id`
-	* `write` with arguments `title` and `body`
-	* `edit` with arguments `article_id` and `body`
-	* `delete` with argument `article_id`
+* the module `article` contains methods:
+	* `read` with argument `article_id` (to identify the wanted article)
+	* `write` with arguments `title` and `body` (data to write into the new created article)
+	* `edit` with arguments `article_id` and `body` (to identify and replace the body)
+	* `delete` with argument `article_id` (to identify which article to delete)
 
-If you want to delete the article of id `52`, I must request `article/delete` passing `article_id`=`52`.
+If you want to delete the article of id `52`, you must request `article/delete` passing `article_id`=`52`.
 
 2 - Usage
 ----
@@ -160,8 +160,8 @@ In order to setup an automatic bound from HTTP requests to API directly, you mus
 ```php
 // let's suppose the url is `/api/{module}/{method}`
 $url = '/api/somemodule/somemethod/1/2/';
-$url = substr($url, strlen('/api'));
-// $url = /somemodule/somemethod/1/2/
+$uri = substr($url, strlen('/api'));
+// $uri = /somemodule/somemethod/1/2/
 ```
 
 > ### 2) give the url to the HTTP manager
@@ -248,13 +248,15 @@ Then can handle various kinds of URL :
 |`{method_description}`|textual description|"Returns a specific article"|
 |`{method_perm}`|permission array|`["poster", "admin", "user"]`|
 |`{is_downloadable}`|If you want this method to return a file|`true`, `false`|
-|`{name_param}`|Your param's name|"id_article"|
+|`{name_param}`|Your param's name _*_|"id_article"|
 |`{desc_param}`|Your param's description|"Wanted article's id"|
 |`{type_param}`|Your param's type (cf. Checker)|"Wanted article's type"|
 |`{is_optional}`|Whether to make your param _required_|`true`, `false`|
 |`{name_output}`|Your output's name|"article"|
 |`{desc_output}`|Your output's description|"Article content"|
 
+_*_ If you want URL (GET) parameters, the {param_name} must be `URL_0`, `URL_1` and so on according to the index wanted in the URL.
+> `api/module/method/URL_0/URL_1/URL_2/`
 
 4 - implementation
 ----
@@ -284,10 +286,11 @@ Arguments are passed to the method as a single argument which an associative arr
 _Notes_:
 * Optional parameters if not given are set to `null`
 * parameters of type `FILE` are given by reference but the use is the same as normal parameters
+* URL parameters are called `URL_0`, `URL_1` and so on according to their order.
 
 ### Ouput required
 
-You must return an associative array containing at least the field `error` containing an instance of `/api/core/Error`, then you can add useful return.
+You must return an associative array containing at least the field `error` containing an instance of `/api/core/Error`, then you can add whatever you want to return in the array.
 
 If you don't return the 'error' field, by default it is set to `new Error(Err::Success)`.
 
@@ -327,3 +330,10 @@ To add a new type, just open the file `/build/api/Checker.php` and add an entry
 
 > **Note:** It is possible to chain `array` type as many as needed.
 **Ex.:** `array<array<id>>` - Will match array only containing arrays that only contains `id` entries.
+
+
+## (5) Advanced
+
+### Before and After scripts
+
+Each time a **method** is called, the api **creates an instance** from the class, and after the execution, the class is **destroyed**. So you can implement the methods `__construct` and `__destruct` to add before and after scripts.
\ No newline at end of file