Enclosing following-sibling nodes before the next elem

Hi,

How can I transform the following XML:

<parent><elem/>text<br/><elem/>word<hr/>word<elem/></parent>

to

<parent>
<elem>text<br/></elem>
<elem>word<hr/>word</elem>
</parent>

I'd like <elem> to enclose all its following-siblings up to either the the next
<elem> or the end tag of its parent element.
How can I do this in XSLT ? Anyone know how can I select these nodes ?

Many thanks,
Michael.


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