Processing PO acknowledgements inbound

Hello,

We have a supplier that sends us PO acknowledgements through EDI. The data from these acknowledgements is inserted into a staging table. We have created a custom program that processes this data and updates promise date in oracle. So far, we have setup only one supplier for this program. There is another supplier that we want to onboard for this process. However, this supplier also sends PO acknowledgements by splitting the original shipment from a blanket release into 2 lines. Now, we want to modify our existing program so that it handles this line splitting scenario and performs below acitivities.