Secret ballot:
<doodle
  title="What is your favorite editor?"
  auth="user"
  ballotType="secret"
>
   * vim
   * emacs
   * other
</doodle>

Private ballot:
<doodle
  title="What is your favorite editor?"
  auth="user"
  ballotType="private"
>
   * vim
   * emacs
   * other
</doodle>

Open ballot:
<doodle
  title="What is your favorite editor?"
  auth="user"
  ballotType="open"
>
   * vim
   * emacs
   * other
</doodle>