NW BPM Collect Pattern (with in the BPM, not as collecting messages from Outside)

Hi,

I am working on a requirement where I need to call an SAP RFC (or a web service for that matter) in a loop and collect all the message responses, combine them in to and send it to another system or another BPM process.

I am completely lost as to how collect the data objects into lists something similar to the containerization operation in classic ccBPM. I can then used an n:1 operation mapping to merge the messages. However, I am struck at collecting them itself.

Any help is appreciated.

Thanks,

VJ