TXMLData

I use delphi 7 and I have alreay downloaded latest version at

http://cc.codegear.com/Item/24535

How can i use TXMLData ?

The wsdlimp.exe generate some TXMLData
Ex: city : TXMLData

I only create this data and the XML result is <city />
I would like to setup attribute and text properties but i don't know how.
The XML result that I want is <city parttype=''cty''>VANCOUVER<city
/>

I try something like that but it doesn't work because the XMLNode is 
ReadOnly
city.XMLNode.Attrubute['partype'] := 'cty'
city.XMLNode.Text := 'VANCOUVER'

Martin Rousseau