How to configure Doctrine using yaml

I rewrote the solution proposed by mahok in http://stackoverflow.com/a/14988359/842697

Author: BraisGabin

Resources/doc/index.md

@@ -115,12 +115,14 @@ and place your `User` class in it.
 > to call parent::__construct(), as the base User class depends on
 > this to initialize some fields.
 
-**a) Doctrine ORM User class**
+#### a) Doctrine ORM User class
 
 If you're persisting your users via the Doctrine ORM, then your `User` class
 should live in the `Entity` namespace of your bundle and look like this to
 start:
 
+##### Annotations
+
 ``` php
 <?php
 // src/Acme/UserBundle/Entity/User.php
@@ -155,7 +157,48 @@ class User extends BaseUser
 
 > `User` is a reserved keyword in SQL so you cannot use it as table name.
 
-**b) MongoDB User class**
+##### yaml
+
+If you use yml to configure Doctrine you must add two files. The Entity and the orm.yml:
+
+```php
+<?php
+// src/Acme/UserBundle/Entity/User.php
+
+namespace Acme\UserBundle\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+use FOS\UserBundle\Entity\User as BaseUser;
+
+/**
+ * User
+ */
+class User extends BaseUser {
+    /**
+     * @var integer
+     */
+    protected $id;
+
+    public function __construct()
+    {
+        parent::__construct();
+        // your own logic
+    }
+}
+```
+```yaml
+# src/Acme/UserBundle/Resources/config/doctrine/User.orm.yml
+Acme\UserBundle\Entity\User:
+    type:  entity
+    table: fos_user
+    id:
+        id:
+            type: integer
+            strategy: { generator: "AUTO" }
+    lifecycleCallbacks: {  }
+```
+
+#### b) MongoDB User class
 
 If you're persisting your users via the Doctrine MongoDB ODM, then your `User`
 class should live in the `Document` namespace of your bundle and look like
@@ -188,7 +231,7 @@ class User extends BaseUser
 }
 ```
 
-**c) CouchDB User class**
+#### c) CouchDB User class
 
 If you're persisting your users via the Doctrine CouchDB ODM, then your `User`
 class should live in the `Document` namespace of your bundle and look like