serializer/tests/JMS/Serializer/Tests/Metadata/Driver/xml/BlogPost.xml

<?xml version="1.0" encoding="UTF-8"?>
<serializer>
    <class name="JMS\Serializer\Tests\Fixtures\BlogPost" xml-root-name="blog-post">
        <property name="title" type="string" groups="comments,post"/>
        <property name="createdAt" xml-attribute="true" type="DateTime"/>
        <property name="published" type="boolean" serialized-name="is_published" xml-attribute="true" groups="post" />
        <property name="comments" groups="comments">
            <type><![CDATA[ArrayCollection<JMS\Serializer\Tests\Fixtures\Comment>]]></type>
            <xml-list inline="true" entry-name="comment" />
        </property>
        <property name="author" groups="post" type="JMS\Serializer\Tests\Fixtures\Author" />
    </class>
</serializer>