Content conversion for multiple recordesets of the same type

Hi

I have a scenario where in i have the follwing structure

BXX

<>

HDR

<>

ITM1

<>

*TM2

<>

Now sometimes i get mutiple records like the following

BXX

<>

HDR (first occurance)

<>

ITM1

<>

ITM2

<>

HDR (2nd occurance)

<>

ITM1

<>

ITM2

<>

ITM3

<>

HDR (Third occurance)

**...**

**....**

**....**

*So now how should my content conversion be to achieve this.*