Cash Flow in SAP BPC 10.0 (NW)

Hi

I am aware that we can prepare cash flow in SAP BPC 10.0 using Accounts transformation Business rules.We have to map our Data Source flow with Consolidation transaction type in ECC for purchase,sale,opening transactions, etc..

I would like to knw "How can we classify a particular exps using Document type for Cash flow purpose:.For eg for Finance activities , we need to capture only Doc type KY from ECC which will be used for finance charges paid".

Any inputs on this will be highly appreciated.

Regards

GT