symfony/tests/Symfony/Tests/Components/DependencyInjection/Fixtures/xml/services10.xml

<?xml version="1.0" ?>

<container xmlns="http://www.symfony-project.org/schema/dic/services"
    xmlns:project="http://www.example.com/schema/project">

    <parameters>
        <parameter key="project.parameter.foo">BAR</parameter>
    </parameters>

    <services>
        <service id="project.service.foo" class="BAR" />
    </services>

    <project:bar />

</container>