JMSSerializerBundle/Tests/Serializer/xml/nested_form_errors.xml

<?xml version="1.0" encoding="UTF-8"?>
<form name="foo">
  <errors>
    <entry><![CDATA[This is the form error]]></entry>
  </errors>
  <form name="bar">
    <errors>
      <entry><![CDATA[Error of the child form]]></entry>
    </errors>
  </form>
</form>