[Twisted-web] nested nevow:data

[Little]

How can i use nested nevow:data construction?

<div n:data="items">
  ...
  <div n:data="subitems">

  </div>
</div>

this construction won't working at all...

For example, first data is array of years ('1997', '1998', e.t.c)
and second data is "select * from .. where year=%s"

And i whant a page with many tables - one table, one year

So i desided to make nested n:data tags:

<div n:data="years" n:render="years">
 <div n:pattern="year">
   <table>
   <div n:data="year" n:render="year" >
       <div n:pattern="item">
          tr td td td
       </div>
  </div>
 </div>

But it doesn't work

Any solution?