International standards IEC 61968 for Distribution Managements Systems and 61970 for Energy Management Systems specify a Common Information Model (CIM) for utility data exchange, Applications Programming Interfaces (API) for application integration, and XML messaging standards. The CIM allows application software to exchange information about the configuration and status of an electrical network.
Reference:
Smart Grid Interoperability Maturity Model
Interoperability and Decision-Maker's Checklist