* <p> <track> </p>
* <li> <track> </li>
* <tr> <track> </tr>
* <td> <track> </td>
* <th> <track> </th>
* <body> <track> </body>
* <colgroup> <track> </colgroup>
* <dd> <track> </dd>
* <dt> <track> </dt>
* <head> <track> </head>
* <html> <track> </html>
* <option> <track> </option>
* <tbody> <track> </tbody>
* <thead> <track> </thead>
* <tfoot> <track> </tfoot>

* <p> <track/> </p>
* <li> <track/> </li>
* <tr> <track/> </tr>
* <td> <track/> </td>
* <th> <track/> </th>
* <body> <track/> </body>
* <colgroup> <track/> </colgroup>
* <dd> <track/> </dd>
* <dt> <track/> </dt>
* <head> <track/> </head>
* <html> <track/> </html>
* <option> <track/> </option>
* <tbody> <track/> </tbody>
* <thead> <track/> </thead>
* <tfoot> <track/> </tfoot>

* <track>
* <track/>
* <track attr="something">
* <track attr="something"/>
* <track attr="something" attr2="someotherthing">
* <track attr="something" attr2="someotherthing"/>
* <track attr="something"
* attr2="someotherting">
* <track attr="something"
* attr2="someotherting"/>
