How to use xslt to transform xml to xml with added nodes

My source xml is of the form:

<a>
texta
</a>

<b>
textb
</b>

<c>
<d e="texte"><f g="textg"/></d>
</c>

I want to transform it to a new xml keeping all the original intact
but adding to <c> such that the new xml would be:

<a>
texta
</a>

<b>
textb
</b>

<c>
<d e="texte"><f g="textg"/></d>
<d e="texth"><f g="texti"/></d>
</c>

I am currently using xt but any parser will do.

Thanks!
     mike


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