Need To sort the data using Message mapping

Hi All,

How can i sort the below structure using message mapping.

I have a structure similar to the one given below:

<Recordset>

   <Item1>

     <Forcast1>

     <Forcast2>

     <Forcast3>

     <Forcast4>

    <Item1>

    <Item2>

     <Forcast1>

     <Forcast2>

     <Forcast3>

     <Forcast4>

    <Item2>

    <Item3>

     <Forcast1>

     <Forcast2>

     <Forcast3>

     <Forcast4>

    <Item3>

    <Item4>

     <Forcast1>

     <Forcast2>

     <Forcast3>

     <Forcast4>

    <Item4>

    <Item5>

     <Forcast1>

     <Forcast2>

     <Forcast3>

     <Forcast4>

    <Item5>

</Recordset>

I need to sort these Items on basis of Forcast2 values using Message Mapping. For ex Forcast2 have these values(10,6,12,1,6) respectively. Then output should be:

<Recordset>

<Item4></Item4>

<Item2></Item2>

<Item5></Item5>

<Item1></Item1>

<Item3></Item3>

<Recordset>