An abbreviation for SQL Management of External Data. It is an API for making external data (both relational and non-relational) accessible within an SQL systemSQL standard. SQLstream s-Server embeds the Farrago platform to support access to foreign data sources, offering JDBC for access to data stored in foreign SQL databases and MDR for access to metadata stored in an MDR (MetaData Repository - including Farrago’s own system catalog). Farrago also supplies a corresponding foreign data wrapper instance named SYS_JDBC, though additional wrapper instances corresponding to specific DBMS types can be defined.