symfony/tests/fixtures/Symfony/Components/DependencyInjection/xml/services3.xml

<?xml version="1.0" ?>

<container xmlns="http://symfony-project.org/2.0/container">
  <parameters>
    <parameter key="foo">foo</parameter>
    <parameter key="values" type="collection">
      <parameter>true</parameter>
      <parameter>false</parameter>
    </parameter>
  </parameters>
</container>