Coding table notes

Hello, 
 
I appreciate your feedback on the code. 
 
I have a page with multiple tables that have their own notes. Here is what I think of for the table notes coding. 
- The table notes in a definition list wrapped with <aside> and placed inside <tfoot> element after <tbody>. Beside having a number to identify each table.
 
<table>
<caption>Table 12 : xyz
<thead> <th> <th> <th> </thead>
<tbody> <td> <td> <td> </tbody>
<tfoot col="3">
<aside class="wb-fnote" role="note">
<h2 id="fn-table12">Table 12 Notes</h2>
<dl> <!-- place <dt> and <dd> here --></dl>
</aside>
</tfoot>
</table>