In SAP PI File to file scenario, what is the use of service interface?

1.	In SAP PI File to file scenario, what is the use of service interface?
Answer» You have to create two service interface here one for inbound and one for the outbound. Right click on Namespace → New → Interface objects → Service Interface

Answer»

You have to create two service interface here one for inbound and one for the outbound.

Right click on Namespace → New → Interface objects → Service Interface

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