<document source="test data">
    <section ids="perl-test" names="perl test">
        <title>
            Perl Test
        <paragraph>
            A perl directive that returns a perl directive.
        <system_message level="1" line="6" source="test data" type="INFO">
            <paragraph>
                No directive entry for "perl" in module "Text::Restructured::Directive".
                Trying "perl" as canonical directive name.
        <paragraph>
            It works.
        <paragraph>
            A paragraph.
