Qt5 XmlListModel nested data

[hailong]

I have an xml file and I want to load it with xmllistmodel. The data structure is similiar to the code below.

@
<itemA>
<settings> </settings>
<ItembArray>
<itemB>
<settings>
</settings>
...
<ItemC>
...
</ItemC>
<ItemC>
...
</ItemC>
</itemB>
...
<itemB>

  ...
<ItemC>
 ...
</ItemC>
<ItemC>
 ...
</ItemC>

</itemB>
</ItembArray>
</itemA>
@

because xmllistmodel can only work as list model, so I want to add 3 views, viewA, ViewB , ViewC, and for each view , there is an xmlListModel, eg. modelA -> viewA, modelB -> viewB, modelC -> viewC. 
I can set the same source for ModelA, ModelB, ModelC and use different query to get the data, but I think this is slow , because I need to open this xml file for many times, (viewA with many ViewBs and ViewB with many ViewCs)， 
So I think may I use model like this

@
modelA{
id: modelA
source: test.xml
role1: itemA/settings
role2: itemA/ItembArray
}

modelB{
    xml: modelA.get(0).role2
    role1: itemB/settings
    role2: itemB/ItemC
}

@

but I don't know how to get the xml source code with XmlRole, is my way correct?

[hailong]

In other words, how can I get the original xml source code from XmlRole so I can set this as other model's xml property.