problem getting group name from xml source

[lolo]

Hello, I need to generate a lot of simple form from xml/xsd documents.
Using infopath, I create a form based on them.
My goal is to generate the basic form simply by drag and dropping the
root node. The problem is that infopath don't print the name of
grouping element in the form. For instance, if i drag a part of the xml
document:
<PoolRef>
<Ref/>
<RefIssr>
<BICOrBEI/>
</RefIssr>
<MsgNm/>
</PoolRef>
<PrvsRef>
<Ref/>
<RefIssr>
<BICOrBEI/>
</RefIssr>
<MsgNm/>
</PrvsRef>

I will get a form with only:
Ref
BICOrBEI
MsgNm

Ref
BICOrBEI
MsgNm

How can i manage to configure it to get the group name directly in the
form (I have to process lot of doc with thousand of fields).