<dl>
  <dt>台北 Taibei</dt>

  <dd>
   <dl>
    <dt>中正
    Zhongzheng</dt>

    <dd>125.1 251.3 124.2b 306.6b</dd>

gives

; 台北 Taibei
: ;; 中正 Zhongzheng
:: 125.1 251.3 124.2b 306.6b

which renders as

 台北 Taibei
     ;; 中正 Zhongzheng

        125.1 251.3 124.2b 306.6b

(No, I don't know how one is supposed to code it.)

They probably don't have a real way... There examples on
http://en.wikipedia.org/wiki/Help:Editing
make
<dl><dt> definition lists
</dt><dd> can be
</dd></dl>
<dl><dt><dl><dt> nested too