symfony/src/Symfony/Framework/DoctrineBundle/Resources/config/orm.xml

<?xml version="1.0" ?>

<container xmlns="http://www.symfony-project.org/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.symfony-project.org/schema/dic/services http://www.symfony-project.org/schema/dic/services/services-1.0.xsd">

  <parameters>
    <parameter key="doctrine.orm.entity_manager.class">Doctrine\ORM\EntityManager</parameter>
    <parameter key="doctrine.orm.metadata_driver_impl.class">Doctrine\ORM\Mapping\Driver\XmlDriver</parameter>
    <parameter key="doctrine.orm.cache.class">Doctrine\Common\Cache\ArrayCache</parameter>
  </parameters>

  <services>
    <service id="doctrine.orm.entity_manager" class="%doctrine.orm.entity_manager.class%" constructor="create">
      <argument type="service" id="doctrine.dbal.connection" />
      <argument type="service" id="doctrine.orm.configuration" />
    </service>

    <service id="doctrine.orm.metadata_driver_impl" class="%doctrine.orm.metadata_driver_impl.class%">
      <argument>%doctrine.orm.metadata_driver_impl.dirs%</argument>
    </service>

    <service id="doctrine.orm.cache" class="%doctrine.orm.cache.class%" />

    <service id="doctrine.orm.configuration" class="Doctrine\ORM\Configuration">
      <call method="setMetadataCacheImpl"><argument type="service" id="doctrine.orm.cache" /></call>
      <call method="setQueryCacheImpl"><argument type="service" id="doctrine.orm.cache" /></call>
      <call method="setResultCacheImpl"><argument type="service" id="doctrine.orm.cache" /></call>
      <call method="setMetadataDriverImpl"><argument type="service" id="doctrine.orm.metadata_driver_impl" /></call>
      <call method="setProxyDir"><argument>%kernel.cache_dir%/doctrine/Proxies</argument></call>
      <call method="setProxyNamespace"><argument>Proxies</argument></call>
      <call method="setAutoGenerateProxyClasses"><argument>true</argument></call>
    </service>
  </services>
</container>