orm_multiple_em_bundle_mappings.xml

<?xml version="1.0" ?>

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

    <config>
        <dbal default-connection="default">
            <connection name="default" dbname="db" />
        </dbal>

        <orm default-entity-manager="em2">
            <entity-manager name="em1">
                <mapping name="AnnotationsBundle" />
                <mapping name="AttributesBundle" type="attribute" />
            </entity-manager>
            <entity-manager name="em2" validate-xml-mapping="true">
                <mapping name="YamlBundle" dir="Resources/config/doctrine" alias="yml" />
                <mapping name="manual" type="xml" prefix="Fixtures\Bundles\XmlBundle"
                    dir="%kernel.root_dir%/Tests/DependencyInjection/Fixtures/Bundles/XmlBundle/Resources/config/doctrine"
                    alias="TestAlias"
                />
            </entity-manager>
        </orm>
    </config>
</srv:container>