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|Title:||A Logical Foundation for Deductive Object-Oriented Databases|
Nonmonotonic multiple inheritance
|Source:||Liu, M., Dobbie, G., Ling, T.W. (2002). A Logical Foundation for Deductive Object-Oriented Databases. ACM Transactions on Database Systems 27 (1) : 117-151. ScholarBank@NUS Repository. https://doi.org/10.1145/507234.507237|
|Abstract:||Over the past decade, a large number of deductive object-oriented database languages have been proposed. The earliest of these languages had few object-oriented features, and more and more features have systematically been incorporated in successive languages. However, a language with a clean logical semantics that naturally accounts for all the key object-oriented features, is still missing from the literature. This article takes us another step towards solving this problem. Two features that are currently missing are the encapsulation of rule-based methods in classes, and nonmonotonic structural and behavioral inheritance with overriding, conflict resolution and blocking. This article introduces the syntax of a language with these features. The language is restricted in the sense that we have omitted other object-oriented and deductive features that are now well understood, in order to make our contribution clearer. It then defines a class of databases, called well-defined databases, that have an intuitive meaning and develops a direct logical semantics for this class of databases. The semantics is based on the well-founded semantics from logic programming. The work presented in this article establishes a firm logical foundation for deductive object-oriented databases.|
|Source Title:||ACM Transactions on Database Systems|
|Appears in Collections:||Staff Publications|
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