I have reread chapter http://www.rebol.com/docs/core23/rebolcore-15.html on any and parse but can't achieve to parse this kind of hiearchical structure: is it possible ?
<Multipage>
<tab id=1>
<box id=1>
</box>
</tab>
<tab id=2>
<box id=2>
Hello
</box>
</tab>
<tab>
</tab>
<tab>
</tab>
</Multipage>