This part of ISO/IEC 9075 defines extensions to Database Language SQL to support management of external data through the use of foreign-data wrappers and datalink types.
ANSI/ISO/IEC 9075-9:2003 history
2003ANSI/ISO/IEC 9075-9:2003 Information technology Database languages SQL Part 9: Management of External Data (SQL/MED) INCITS Adoption