Qs on repeating tables and sections

[pr]

Hi
I am designing a form which maps to an XML schema as datasource. The XML
schema has nested elements like
<A att1="1", att2="2">
<B att3="a", att4="b"></B>
<B att3="c",att4="d"></B>
</A>
<A att1="3", att2="4">
<B att3="a", att4="b"></B>
<B att3="c",att4="d"></B>
</A>
The output has to be a nested repeating table in this fashion
_________________
att1|att3 | att2 |att4
=============
1 |a |2 |b
|c | |d
3 |a |4 |b
|c | |d

How can I go about this ?

Thanks