diff --git a/reference/constraints/Callback.rst b/reference/constraints/Callback.rst
index 218ce7f2c25..bee68c83055 100644
--- a/reference/constraints/Callback.rst
+++ b/reference/constraints/Callback.rst
@@ -186,7 +186,7 @@ You can then use the following configuration to invoke this validator:
     .. code-block:: php-annotations
 
         // src/AppBundle/Entity/Author.php
-        namespace Acme\BlogBundle\Entity;
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
diff --git a/reference/constraints/Expression.rst b/reference/constraints/Expression.rst
index 81fc3560275..9f5ce639966 100644
--- a/reference/constraints/Expression.rst
+++ b/reference/constraints/Expression.rst
@@ -24,7 +24,8 @@ Basic Usage
 Imagine you have a class ``BlogPost`` with ``category`` and ``isTechnicalPost``
 properties::
 
-    namespace Acme\DemoBundle\Model;
+    // src/AppBundle/Model/BlogPost.php
+    namespace AppBundle\Model;
 
     use Symfony\Component\Validator\Constraints as Assert;
 
@@ -61,8 +62,8 @@ One way to accomplish this is with the Expression constraint:
 
     .. code-block:: yaml
 
-        # src/Acme/DemoBundle/Resources/config/validation.yml
-        Acme\DemoBundle\Model\BlogPost:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Model\BlogPost:
             constraints:
                 - Expression:
                     expression: "this.getCategory() in ['php', 'symfony'] or !this.isTechnicalPost()"
@@ -70,8 +71,8 @@ One way to accomplish this is with the Expression constraint:
 
     .. code-block:: php-annotations
 
-        // src/Acme/DemoBundle/Model/BlogPost.php
-        namespace Acme\DemoBundle\Model;
+        // src/AppBundle/Model/BlogPost.php
+        namespace AppBundle\Model;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -88,12 +89,12 @@ One way to accomplish this is with the Expression constraint:
 
     .. code-block:: xml
 
-        <!-- src/Acme/DemoBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
-            <class name="Acme\DemoBundle\Model\BlogPost">
+            <class name="AppBundle\Model\BlogPost">
                 <constraint name="Expression">
                     <option name="expression">
                         this.getCategory() in ['php', 'symfony'] or !this.isTechnicalPost()
@@ -107,8 +108,8 @@ One way to accomplish this is with the Expression constraint:
 
     .. code-block:: php
 
-        // src/Acme/DemoBundle/Model/BlogPost.php
-        namespace Acme\DemoBundle\Model;
+        // src/AppBundle/Model/BlogPost.php
+        namespace AppBundle\Model;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -142,8 +143,8 @@ more about the expression language syntax, see
 
         .. code-block:: yaml
 
-            # src/Acme/DemoBundle/Resources/config/validation.yml
-            Acme\DemoBundle\Model\BlogPost:
+            # src/AppBundle/Resources/config/validation.yml
+            AppBundle\Model\BlogPost:
                 properties:
                     isTechnicalPost:
                         - Expression:
@@ -152,8 +153,8 @@ more about the expression language syntax, see
 
         .. code-block:: php-annotations
 
-            // src/Acme/DemoBundle/Model/BlogPost.php
-            namespace Acme\DemoBundle\Model;
+            // src/AppBundle/Model/BlogPost.php
+            namespace AppBundle\Model;
 
             use Symfony\Component\Validator\Constraints as Assert;
 
@@ -174,13 +175,13 @@ more about the expression language syntax, see
 
         .. code-block:: xml
 
-            <!-- src/Acme/DemoBundle/Resources/config/validation.xml -->
+            <!-- src/AppBundle/Resources/config/validation.xml -->
             <?xml version="1.0" encoding="UTF-8" ?>
             <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-                <class name="Acme\DemoBundle\Model\BlogPost">
+                <class name="AppBundle\Model\BlogPost">
                     <property name="isTechnicalPost">
                         <constraint name="Expression">
                             <option name="expression">
@@ -196,8 +197,8 @@ more about the expression language syntax, see
 
         .. code-block:: php
 
-            // src/Acme/DemoBundle/Model/BlogPost.php
-            namespace Acme\DemoBundle\Model;
+            // src/AppBundle/Model/BlogPost.php
+            namespace AppBundle\Model;
 
             use Symfony\Component\Validator\Constraints as Assert;
             use Symfony\Component\Validator\Mapping\ClassMetadata;
diff --git a/reference/constraints/GreaterThan.rst b/reference/constraints/GreaterThan.rst
index 6504dad304a..cc1372f3bbd 100644
--- a/reference/constraints/GreaterThan.rst
+++ b/reference/constraints/GreaterThan.rst
@@ -104,8 +104,8 @@ that a date must at least be the next day:
 
     .. code-block:: php-annotations
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -119,21 +119,21 @@ that a date must at least be the next day:
 
     .. code-block:: yaml
 
-        # src/Acme/OrderBundle/Resources/config/validation.yml
-        Acme\OrderBundle\Entity\Order:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Order:
             properties:
                 deliveryDate:
                     - GreaterThan: today
 
     .. code-block:: xml
 
-        <!-- src/Acme/OrderBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\OrderBundle\Entity\Order">
+            <class name="AppBundle\Entity\Order">
                 <property name="deliveryDate">
                     <constraint name="GreaterThan">today</constraint>
                 </property>
@@ -142,8 +142,8 @@ that a date must at least be the next day:
 
     .. code-block:: php
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -163,8 +163,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php-annotations
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -178,21 +178,21 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: yaml
 
-        # src/Acme/OrderBundle/Resources/config/validation.yml
-        Acme\OrderBundle\Entity\Order:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Order:
             properties:
                 deliveryDate:
                     - GreaterThan: today UTC
 
     .. code-block:: xml
 
-        <!-- src/Acme/OrderBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\OrderBundle\Entity\Order">
+            <class name="AppBundle\Entity\Order">
                 <property name="deliveryDate">
                     <constraint name="GreaterThan">today UTC</constraint>
                 </property>
@@ -201,8 +201,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -223,8 +223,8 @@ current time:
 
     .. code-block:: php-annotations
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -238,21 +238,21 @@ current time:
 
     .. code-block:: yaml
 
-        # src/Acme/OrderBundle/Resources/config/validation.yml
-        Acme\OrderBundle\Entity\Order:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Order:
             properties:
                 deliveryDate:
                     - GreaterThan: +5 hours
 
     .. code-block:: xml
 
-        <!-- src/Acme/OrderBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\OrderBundle\Entity\Order">
+            <class name="AppBundle\Entity\Order">
                 <property name="deliveryDate">
                     <constraint name="GreaterThan">+5 hours</constraint>
                 </property>
@@ -261,8 +261,8 @@ current time:
 
     .. code-block:: php
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
diff --git a/reference/constraints/GreaterThanOrEqual.rst b/reference/constraints/GreaterThanOrEqual.rst
index 0db592ba504..822b8bc10bc 100644
--- a/reference/constraints/GreaterThanOrEqual.rst
+++ b/reference/constraints/GreaterThanOrEqual.rst
@@ -103,8 +103,8 @@ that a date must at least be the current day:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -118,21 +118,21 @@ that a date must at least be the current day:
 
     .. code-block:: yaml
 
-        # src/OrderBundle/Resources/config/validation.yml
-        Acme\OrderBundle\Entity\Order:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Order:
             properties:
                 deliveryDate:
                     - GreaterThanOrEqual: today
 
     .. code-block:: xml
 
-        <!-- src/Acme/OrderBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\OrderBundle\Entity\Order">
+            <class name="AppBundle\Entity\Order">
                 <property name="deliveryDate">
                     <constraint name="GreaterThanOrEqual">today</constraint>
                 </property>
@@ -141,8 +141,8 @@ that a date must at least be the current day:
 
     .. code-block:: php
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -162,8 +162,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -177,21 +177,21 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: yaml
 
-        # src/OrderBundle/Resources/config/validation.yml
-        Acme\OrderBundle\Entity\Order:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Order:
             properties:
                 deliveryDate:
                     - GreaterThanOrEqual: today UTC
 
     .. code-block:: xml
 
-        <!-- src/Acme/OrderBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\OrderBundle\Entity\Order">
+            <class name="AppBundle\Entity\Order">
                 <property name="deliveryDate">
                     <constraint name="GreaterThanOrEqual">today UTC</constraint>
                 </property>
@@ -200,8 +200,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -222,8 +222,8 @@ current time:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -237,21 +237,21 @@ current time:
 
     .. code-block:: yaml
 
-        # src/OrderBundle/Resources/config/validation.yml
-        Acme\OrderBundle\Entity\Order:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Order:
             properties:
                 deliveryDate:
                     - GreaterThanOrEqual: +5 hours
 
     .. code-block:: xml
 
-        <!-- src/Acme/OrderBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\OrderBundle\Entity\Order">
+            <class name="AppBundle\Entity\Order">
                 <property name="deliveryDate">
                     <constraint name="GreaterThanOrEqual">+5 hours</constraint>
                 </property>
@@ -260,8 +260,8 @@ current time:
 
     .. code-block:: php
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
diff --git a/reference/constraints/Image.rst b/reference/constraints/Image.rst
index 8d99bc2686a..85cf5473134 100644
--- a/reference/constraints/Image.rst
+++ b/reference/constraints/Image.rst
@@ -160,8 +160,8 @@ following code:
 
     .. code-block:: php-annotations
 
-        // src/Acme/BlogBundle/Entity/Author.php
-        namespace Acme\BlogBundle\Entity;
+        // src/AppBundle/Entity/Author.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -178,8 +178,8 @@ following code:
 
     .. code-block:: yaml
 
-        # src/Acme/BlogBundle/Resources/config/validation.yml
-        Acme\BlogBundle\Entity\Author
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Author
             properties:
                 headshot:
                     - Image:
@@ -188,8 +188,8 @@ following code:
 
     .. code-block:: xml
 
-        <!-- src/Acme/BlogBundle/Resources/config/validation.xml -->
-        <class name="Acme\BlogBundle\Entity\Author">
+        <!-- src/AppBundle/Resources/config/validation.xml -->
+        <class name="AppBundle\Entity\Author">
             <property name="headshot">
                 <constraint name="Image">
                     <option name="allowLandscape">false</option>
@@ -200,8 +200,8 @@ following code:
 
     .. code-block:: php
 
-        // src/Acme/BlogBundle/Entity/Author.php
-        namespace Acme\BlogBundle\Entity;
+        // src/AppBundle/Entity/Author.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
diff --git a/reference/constraints/LessThan.rst b/reference/constraints/LessThan.rst
index ee4c2e39f57..65f171bf834 100644
--- a/reference/constraints/LessThan.rst
+++ b/reference/constraints/LessThan.rst
@@ -104,8 +104,8 @@ that a date must be in the past like this:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -119,21 +119,21 @@ that a date must be in the past like this:
 
     .. code-block:: yaml
 
-        # src/SocialBundle/Resources/config/validation.yml
-        Acme\SocialBundle\Entity\Person:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Person:
             properties:
                 dateOfBirth:
                     - LessThan: today
 
     .. code-block:: xml
 
-        <!-- src/Acme/SocialBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\SocialBundle\Entity\Person">
+            <class name="AppBundle\Entity\Person">
                 <property name="dateOfBirth">
                     <constraint name="LessThan">today</constraint>
                 </property>
@@ -142,8 +142,8 @@ that a date must be in the past like this:
 
     .. code-block:: php
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -163,8 +163,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -178,21 +178,21 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: yaml
 
-        # src/SocialBundle/Resources/config/validation.yml
-        Acme\SocialBundle\Entity\Person:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Person:
             properties:
                 dateOfBirth:
                     - LessThan: today UTC
 
     .. code-block:: xml
 
-        <!-- src/Acme/SocialBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\SocialBundle\Entity\Person">
+            <class name="AppBundle\Entity\Person">
                 <property name="dateOfBirth">
                     <constraint name="LessThan">today UTC</constraint>
                 </property>
@@ -201,8 +201,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -222,8 +222,8 @@ can check that a person must be at least 18 years old like this:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -237,21 +237,21 @@ can check that a person must be at least 18 years old like this:
 
     .. code-block:: yaml
 
-        # src/SocialBundle/Resources/config/validation.yml
-        Acme\SocialBundle\Entity\Person:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Person:
             properties:
                 dateOfBirth:
                     - LessThan: -18 years
 
     .. code-block:: xml
 
-        <!-- src/Acme/SocialBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\SocialBundle\Entity\Person">
+            <class name="AppBundle\Entity\Person">
                 <property name="dateOfBirth">
                     <constraint name="LessThan">-18 years</constraint>
                 </property>
@@ -260,8 +260,8 @@ can check that a person must be at least 18 years old like this:
 
     .. code-block:: php
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
diff --git a/reference/constraints/LessThanOrEqual.rst b/reference/constraints/LessThanOrEqual.rst
index 8eff568fd29..48d3b1cef61 100644
--- a/reference/constraints/LessThanOrEqual.rst
+++ b/reference/constraints/LessThanOrEqual.rst
@@ -103,8 +103,8 @@ that a date must be today or in the past like this:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -118,21 +118,21 @@ that a date must be today or in the past like this:
 
     .. code-block:: yaml
 
-        # src/SocialBundle/Resources/config/validation.yml
-        Acme\SocialBundle\Entity\Person:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Person:
             properties:
                 age:
                     - LessThanOrEqual: today
 
     .. code-block:: xml
 
-        <!-- src/Acme/SocialBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\SocialBundle\Entity\Person">
+            <class name="AppBundle\Entity\Person">
                 <property name="age">
                     <constraint name="LessThanOrEqual">today</constraint>
                 </property>
@@ -141,8 +141,8 @@ that a date must be today or in the past like this:
 
     .. code-block:: php
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -162,8 +162,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -177,21 +177,21 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: yaml
 
-        # src/SocialBundle/Resources/config/validation.yml
-        Acme\SocialBundle\Entity\Person:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Person:
             properties:
                 age:
                     - LessThanOrEqual: today UTC
 
     .. code-block:: xml
 
-        <!-- src/Acme/SocialBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\SocialBundle\Entity\Person">
+            <class name="AppBundle\Entity\Person">
                 <property name="age">
                     <constraint name="LessThanOrEqual">today UTC</constraint>
                 </property>
@@ -200,8 +200,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -221,8 +221,8 @@ can check that a person must be at least 18 years old like this:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -236,21 +236,21 @@ can check that a person must be at least 18 years old like this:
 
     .. code-block:: yaml
 
-        # src/SocialBundle/Resources/config/validation.yml
-        Acme\SocialBundle\Entity\Person:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Person:
             properties:
                 age:
                     - LessThanOrEqual: -18 years
 
     .. code-block:: xml
 
-        <!-- src/Acme/SocialBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\SocialBundle\Entity\Person">
+            <class name="AppBundle\Entity\Person">
                 <property name="age">
                     <constraint name="LessThanOrEqual">-18 years</constraint>
                 </property>
@@ -259,8 +259,8 @@ can check that a person must be at least 18 years old like this:
 
     .. code-block:: php
 
-        // src/Acme/SocialBundle/Entity/Person.php
-        namespace Acme\SocialBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
diff --git a/reference/constraints/Range.rst b/reference/constraints/Range.rst
index 6238167063f..6b433e6ae0c 100644
--- a/reference/constraints/Range.rst
+++ b/reference/constraints/Range.rst
@@ -111,8 +111,8 @@ date must lie within the current year like this:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Event.php
-        namespace Acme\EventBundle\Entity;
+        // src/AppBundle/Entity/Event.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -129,8 +129,8 @@ date must lie within the current year like this:
 
     .. code-block:: yaml
 
-        # src/EventBundle/Resources/config/validation.yml
-        Acme\EventBundle\Entity\Event:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Event:
             properties:
                 startDate:
                     - Range:
@@ -139,13 +139,13 @@ date must lie within the current year like this:
 
     .. code-block:: xml
 
-        <!-- src/Acme/EventBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\EventBundle\Entity\Event">
+            <class name="AppBundle\Entity\Event">
                 <property name="startDate">
                     <constraint name="Range">
                         <option name="min">first day of January</option>
@@ -157,8 +157,8 @@ date must lie within the current year like this:
 
     .. code-block:: php
 
-        // src/Acme/EventBundle/Entity/Event.php
-        namespace Acme\EventBundle\Entity;
+        // src/AppBundle/Entity/Event.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -181,8 +181,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Event.php
-        namespace Acme\EventBundle\Entity;
+        // src/AppBundle/Entity/Event.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -199,8 +199,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: yaml
 
-        # src/EventBundle/Resources/config/validation.yml
-        Acme\EventBundle\Entity\Event:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Event:
             properties:
                 startDate:
                     - Range:
@@ -209,13 +209,13 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: xml
 
-        <!-- src/Acme/EventBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\EventBundle\Entity\Event">
+            <class name="AppBundle\Entity\Event">
                 <property name="startDate">
                     <constraint name="Range">
                         <option name="min">first day of January UTC</option>
@@ -227,8 +227,8 @@ dates. If you want to fix the timezone, append it to the date string:
 
     .. code-block:: php
 
-        // src/Acme/EventBundle/Entity/Person.php
-        namespace Acme\EventBundle\Entity;
+        // src/AppBundle/Entity/Person.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
@@ -251,8 +251,8 @@ can check that a delivery date starts within the next five hours like this:
 
     .. code-block:: php-annotations
 
-        // src/Acme/SocialBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -269,8 +269,8 @@ can check that a delivery date starts within the next five hours like this:
 
     .. code-block:: yaml
 
-        # src/OrderBundle/Resources/config/validation.yml
-        Acme\OrderBundle\Entity\Order:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Order:
             properties:
                 deliveryDate:
                     - Range:
@@ -279,13 +279,13 @@ can check that a delivery date starts within the next five hours like this:
 
     .. code-block:: xml
 
-        <!-- src/Acme/OrderBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\OrderBundle\Entity\Order">
+            <class name="AppBundle\Entity\Order">
                 <property name="deliveryDate">
                     <constraint name="Range">
                         <option name="min">now</option>
@@ -297,8 +297,8 @@ can check that a delivery date starts within the next five hours like this:
 
     .. code-block:: php
 
-        // src/Acme/OrderBundle/Entity/Order.php
-        namespace Acme\OrderBundle\Entity;
+        // src/AppBundle/Entity/Order.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
diff --git a/reference/constraints/True.rst b/reference/constraints/True.rst
index 18dea513a45..268ecfcfe1b 100644
--- a/reference/constraints/True.rst
+++ b/reference/constraints/True.rst
@@ -74,7 +74,7 @@ Then you can constrain this method with ``True``.
 
     .. code-block:: xml
 
-        <!-- src/Acme/Blogbundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
diff --git a/reference/constraints/Url.rst b/reference/constraints/Url.rst
index c8134de6abe..c33351d16cf 100644
--- a/reference/constraints/Url.rst
+++ b/reference/constraints/Url.rst
@@ -241,8 +241,8 @@ option to ``true``:
 
     .. code-block:: php-annotations
 
-        // src/Acme/BlogBundle/Entity/Author.php
-        namespace Acme\BlogBundle\Entity;
+        // src/AppBundle/Entity/Author.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -258,21 +258,21 @@ option to ``true``:
 
     .. code-block:: yaml
 
-        # src/Acme/BlogBundle/Resources/config/validation.yml
-        Acme\BlogBundle\Entity\Author:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Author:
             properties:
                 bioUrl:
                     - Url: { checkDNS: true }
 
     .. code-block:: xml
 
-        <!-- src/Acme/BlogBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\BlogBundle\Entity\Author">
+            <class name="AppBundle\Entity\Author">
                 <property name="bioUrl">
                     <constraint name="Url">
                         <option name="checkDNS">true</option>
@@ -283,8 +283,8 @@ option to ``true``:
 
     .. code-block:: php
 
-        // src/Acme/BlogBundle/Entity/Author.php
-        namespace Acme\BlogBundle\Entity;
+        // src/AppBundle/Entity/Author.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;
diff --git a/reference/constraints/Uuid.rst b/reference/constraints/Uuid.rst
index c3495b6ebaf..a6ff7876560 100644
--- a/reference/constraints/Uuid.rst
+++ b/reference/constraints/Uuid.rst
@@ -26,16 +26,16 @@ Basic Usage
 
     .. code-block:: yaml
 
-        # src/UploadsBundle/Resources/config/validation.yml
-        Acme\UploadsBundle\Entity\File:
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\File:
             properties:
                 identifier:
                     - Uuid: ~
 
     .. code-block:: php-annotations
 
-        // src/Acme/UploadsBundle/Entity/File.php
-        namespace Acme\UploadsBundle\Entity;
+        // src/AppBundle/Entity/File.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Constraints as Assert;
 
@@ -49,13 +49,13 @@ Basic Usage
 
     .. code-block:: xml
 
-        <!-- src/Acme/UploadsBundle/Resources/config/validation.xml -->
+        <!-- src/AppBundle/Resources/config/validation.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
 
-            <class name="Acme\UploadsBundle\Entity\File">
+            <class name="AppBundle\Entity\File">
                 <property name="identifier">
                     <constraint name="Uuid" />
                 </property>
@@ -64,8 +64,8 @@ Basic Usage
 
     .. code-block:: php
 
-        // src/Acme/UploadsBundle/Entity/File.php
-        namespace Acme\UploadsBundle\Entity;
+        // src/AppBundle/Entity/File.php
+        namespace AppBundle\Entity;
 
         use Symfony\Component\Validator\Mapping\ClassMetadata;
         use Symfony\Component\Validator\Constraints as Assert;