       <ol>
         <li>
          REVIEW
         </li>
         <li>
          OBITUARY
         </li>
         <li>
          ANALYSIS
         </li>
        </ol>
       </td>
       <td>
        optional
       </td>
       <td>
       </td>
      </tr>
      <tr>
       <td>
        43
       </td>
       <td>
        url
       </td>
       <td>
        <code>
         string
        </code>
       </td>
       <td>
        This field specifies the location of the online version of the article. The
