The capability to communicate, execute programs, or transfer data among various functional units in a useful and meaningful manner that requires the user to have little or no knowledge of the unique characteristics of those units. Foundational, syntactic, and semantic interoperability are the three necessary aspects of interoperability.REFERENCE. Research Data Alliance ; The Open Group TOGAF Documentation. TBS Standard On Metadata (Dublin Core Metadata Initiative); DAMA Dictionary of Data Management; ISO/IEC 2382-01, Information Technology Vocabulary, Fundamental Terms