[PHPTAL] nested macro

[Piotr Kabacinski]

Hello,
I'm wondering if it's possibile to do the following

Prepare macro similar to this
<div metal:define-macro="main_list" class="list_frame">
  <b tal:content="list_title"></b><br/>
  <div class="list">
     <span tal:replace="list_content"/>
  </div>
</div>

Use it in this way
<div metal:use-macro="main_list"
  tal:define="list_title string:Main List">
  <li>one
  <li>two
</div>

And, what i want to obtain in html is
<div class="list_frame">
  <big>Main List</big>
  <div class="list">
  <li>one
  <li>two
</div>

The problem is how to fullfil variables list_title and list_content?
Maybe there is phptal variable that holds tag content and i could use it
in macro definition?

greetings
----------------
Piotr Kabacinski