The success of relational systems in the 1990s is evident. However, there is significant
dispute regarding the next generation of DBMSs. The traditionalists believe that it is
sufficient to extend the relational model with additional capabilities. On the one hand, oneinfluential group has published the Object-Oriented Database System Manifesto based on
the object-oriented paradigm, which we presented in Section 26.1.4 (Atkinson et al.,
1989). On the other hand, the Committee for Advanced DBMS Function (CADF) has published
the Third-Generation Database System Manifesto which defines a number of principles
that a DBMS ought to meet (Stonebraker et al., 1990). More recently, Darwen and
Date (1995, 2000) have published the Third Manifesto in defense of the relational data
model. In this section we examine both these manifestos