Hello experts,
i'm currently working on redesign of some old interfaces between our SAP system and legacy systems.
Some of these were built via RFC (remote enabled function call done by remote system).
The functions are in most of cases doing retrieval of data (selection of data according to parameters and fill export parameters with the results).
And most of time of common data (PO, SO, Deliveries,....).
My approach is to check if instead to the custom functions, some standard bapis could be used.
The remote system could call these bapi via RFC as today.
The bapis could need to be adapted (exits, badis,..) to fit the existing requirement.
The 2nd idea was to no more use RFC call but use Web services (by generating the service for the functions to be used).
For the interfaces doing data update (update, creation,....)
approach is trying to find standard bapi which could fulfill the need or standard idocs.
What do you think ?
Any idea, remark, is welcome 
S.N