ViewSystem: integrating heterogeneous information bases by object-oriented views

In order to overcome practical integration problems, ViewSystem, an object-oriented programming environment with dedicated integration operators by which syntactically and semantically heterogeneous information can be integrated incrementally, has been developed. ViewSystem provides an object-oriented query language and a method language with universal computational power and a distinguished set of class constructors for deriving classes from underlying classes. To process queries against derived classes, a hybrid approach combining the techniques of query decomposition and materialization is proposed.<
>