Build hierarchies

Does anyone have thoughts on the suitability of xslt/techniques for 
transforming non-nested structures to nested ones? e.g.
Given input such as:

<para role="h1">Text</para>
<para/>
<para/>
{deleted stuff...}
<para role="h1">
....

produce output such as:

<para role="h1"><para>Text</para>
<para/>
<para/>
{deleted stuff...}
</para>

...where the appearance of the second <para role="h1"> effectively marks 
the closure of the preceeding one.

--
Steve Lloyd, XML Developer-Editorial Production Dept.
International Baccalaureate Organisation
Tel: +44 29 2054 7869
FAX: +44 29 2054 7778



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