Creating nodes in the message at runtime

Hi All,

Source structure of my message is :

<recordset>

<Query></Query>----

0 to unbounded

</recordset>

Target Structure :

<SQL>

<key></key>----

0 to unbounded

</SQL>

Now my requirement is such that....if the source message has 3 Query elements then XI should generate key node in target message 3 times but with names key1,key2,key3.

I am not able to set the names of these target nodes at runtime based on the number of query elements in source message.

Can anybody please help me?