              <th>required?</th>
                <th>default</th>
                <th>choices</th>
            </tr>
            <tr>
                <td><code>name</code></td>
                <td>Tag name</td>
                <td>text</td>
                <td>Yes</td>
                <td></td>
                <td>
                </td>
            </tr>
            <tr>
                <td><code>ns</code></td>
                <td>XML Namespace</td>
                <td>text</td>
                <td>No</td>
