Until recently, the choice of DBMS seemed to be between the relational DBMS and the
object-oriented DBMS. However, many vendors of RDBMS products are conscious of the
threat and promise of the OODBMS. They agree that traditional relational DBMSs are not
suited to the advanced applications discussed in Section 25.1, and that added functionality
is required. However, they reject the claim that extended RDBMSs will not provide
sufficient functionality or will be too slow to cope adequately with the new complexity.