As of SAP Netweaver PI 7.1 , Interface mapping is replaced by
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Message mapping
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Communication Channel
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Operation mapping
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Communication Component
With PI 7.1, interface mapping was replaced by operation mapping, which provides a more granular approach to mapping operations within service interfaces. This change aligns with the shift toward service-oriented concepts.
In SAP NetWeaver Process Integration (PI) 7.1, SAP renamed and restructured the mapping objects in the Integration Repository: the old 'Interface Mapping' object (which linked source and target message interfaces together with their message mappings) was replaced by 'Operation Mapping,' which performs the same role but is aligned with the newer service-interface/operation-based modeling introduced in that release. 'Message Mapping' is a different, still-existing object that defines field-level transformation between message types - it wasn't replaced, it's used inside an Operation Mapping. 'Communication Channel' and 'Communication Component' are Integration Directory/System Landscape concepts for connectivity, unrelated to interface-to-interface mapping. Only Operation Mapping is the direct successor to Interface Mapping.