Federated Database Management System FDBMS is a group of a given extension of DBMS, it supports heterogeneous data sharing between multiple libraries, interactive operations and autonomy,and support for multi-database queries involving up to a maximum amendment relates only to a database of federal affairs,the data FDBMS the same language and the original DBMS to facilitate applications from a single library to the heterogeneous multi-database transformation, the Federal Each local database has an input mode and an output mode, input mode and the conceptual model and constitute a federal model, the entire Federation no global schema.
