Role of XI in interface!

Hello all,
we have a requirement to retrieve forecast data from a third party system (manugistics) and update a ztable in SAP R/3 system. For this we are supposed to XI and I am confused what role does XI play in this simple interface?
Thanks,

XI has the ability to call any RFC/IDOCs and in your case, you would have to write a BAPI/RFC to insert the data in the ZTable.  In XI you define your structures and map the fields and during runtime XI calls the RFC and passes the data to R/3.  Normally an ABAPer role would mostly on the R/3 side creating the RFC, if any are needed.  The main selling point for XI is a single shop for various integration needs of an organization.
hith
Sunil Achyut

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