InfoPath Dev

Thank you for answer but still I have  problem. Can i with this solution below, copy/append Item[2] in MainDataSource: try             {                 ...

 I need to copy node List1 and its child nodes: -<List1> --Item1 --Item2  </List1> to dokument like: <Lists> (repeting fields)  -<List1> ---Item1 ---Item2  -</List1> -<List2> ---Item1 ---Item2  -</List2> ...  </Lists>