also include XML and PHP config:

````rst
default values:

.. configuration-block::

    .. code-block:: yaml

        sonata_seo:
            page:
                title: Default title
                metas:
                    names:
                        description: default description
                        keywords: default, key, other

    .. code-block:: php

        $container->loadFromExtension('sonata_seo', array(
            'page' => array(
                'title' => 'Default title',
                'metas' => array(
                    'names' => array(
                        'description' => 'default description',
                        'keywords' => 'default, key, other',
                    ),
                ),
            ),
        ));
````