Added a note that YAML component needed to load YAML files into servi…

…ce container
symfony · weaverryan · Aug 4, 2012 · Aug 2, 2012 · Aug 2, 2012 · 7f123023bb51309a443028e7275322d2fa40dd8d
commit 7f123023bb51309a443028e7275322d2fa40dd8d
diff --git a/components/dependency_injection/introduction.rst b/components/dependency_injection/introduction.rst
@@ -204,7 +204,7 @@ files. To do this you also need to install the Config component:
 * Install it via PEAR ( `pear.symfony.com/Config`);
 * Install it via Composer (`symfony/config` on Packagist).

-Loading an xml config file:
+Loading an XML config file:

 .. code-block:: php

@@ -216,7 +216,7 @@ Loading an xml config file:
    $loader = new XmlFileLoader($container, new FileLocator(__DIR__));
    $loader->load('services.xml');

-Loading a yaml config file:
+Loading a YAML config file:

 .. code-block:: php

@@ -228,6 +228,11 @@ Loading a yaml config file:
    $loader = new YamlFileLoader($container, new FileLocator(__DIR__));
    $loader->load('services.yml');

+.. note::
+
+    If you want to load YAML config files then you will also need to install
+    :doc:`The YAML component</components/yaml>`.
+
 The ``newsletter_manager`` and ``mailer`` services can be set up using config files:

 .. configuration-block::