Idoc to File Scenario

Hi,

Im new to XI and Im trying to configure Idoc(DEBCOR. DEBCOR01) to file Scenario. Is there any good documentation with example to start with. I have configured Idoc part and I can see the Idoc sitting in XI. But Im unable to save that as XML file.

What is the message interface to create inbound/outbound

In interface mapping what is the source and target interface. What should be interface determination and Receiver determination.

Can anyone tell me the steps to achieve steps.

Thanks in advance

Maya.