item.xml

<?xml version="1.0"?>
<item>
    <a:table xmlns:a="https://www.example.com/network">
        <a:tr>
            <a:td>Router</a:td>
            <a:td>Switch</a:td>
        </a:tr>
    </a:table>

    <b:table xmlns:b="https://www.example.com/furniture">
        <b:name>Coffee Table</b:name>
        <b:length>180</b:length>
        <b:width>80</b:width>
    </b:table>
</item>