Interoperability is the ability of two or more systems to work with each other. In the loosely coupled environment of a service-oriented architecture (SOA), separate resources don’t have to know how each of them work, but they do need to interoperate with each other by having enough common ground to exchange messages without error or misunderstanding.
On the other hand, semantics is the intended meaning. In computing, semantics is the assumed or explicit set of understandings used in a system to give data meaning. Semantic interoperability is the foundation of a SOA implementation. It ensures that service consumers and providers exchange data consistently and flexibly.
