FI-CO real time integration rule for selecting intercompany maintenance order settlement

Hi All,

we have inter-company maintenance order settlements in our system.

we now want post this inter-company maintenance order settlements in FI also using FI-CO real time integration.

but the challenge here is we only want post inter-company maintenance order settlements from CO to FI using this integration. we don't want to post any other transactions from CO to FI using real time integration. could some one explain me how to achieve this.

I believe that we should be defining a rule for selecting CO line items..

if so could some one explain me how exactly to do the same. like how to define the rule, what should be selection parameters, how to use it etc..

Thanks a ton in advance.

Sree