Intensional Answers in Object-Oriented Database Systems

Applying Intensional Query Processing Techniques to Object-Oriented Database Systems

Conventional database systems generate a set of facts (extensional answers) as an answer for a given query. This also applies to object-oriented databases where a set of objects will be returned. However, deductive database systems give an opportunity to obtain the answer ofa query as a set offormulas @tensional answers). Intensional answers provide users additional insight to the nature ofexte...

Intensional Answers to Database Queries

In addition to data, database systems store various on keys, integrity constraints, class hierarchies), are often kinds of information about their data. Examples are class hierarchies, to define the various data classes and their relationships; assumed as well, but little else is assumed. integrity constraints, to state required relationships among the Notable examples of this approach are the ...

Schema Versions in Object-Oriented Database Systems

Object-oriented database management systems (OODBMS) are especially suited to model complex and highly dynamic application domains. In this paper, we propose a schema uersioning approach which supports the dynamic change of an objectoriented database schema while it is used by running applications. OUT mechanism allows to have applications working with diflerent schema weTsions on top of the sa...

Integrity Independence In Object-Oriented Database Systems

Updating Views in Object Oriented Database Systems

A variety of view definitions have been defined for object oriented database systems. In this paper we study the problem of what happens to a view when the underlying schema and database are updated. We introduce the new concept of non-side effect view. A non-side effect view is a view which is re-computed dynamically so that schema modifications are (whenever possible) "filtered out" from appl...