Titlebook: Database Theory - ICDT ‘95; 5th International Co Georg Gottlob,Moshe Y. Vardi Conference proceedings 1995 Springer-Verlag Berlin Heidelberg

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Encumber

Jeanne E Parker,Debra L Hollister also isolate a syntactic condition that guarantees the existence of a unique stable model for a program. This condition, in its turn, is inspired by the local stratification condition of perfect model semantics for programs with negation. Finally we define a bottom-up procedure that computes the unique stable model of a stratified program.

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Bernstein-test

Expediency

Conference proceedings 1995ll invited papers and the abstracts of two tutorials, the book includes the revised full versions of 29 technical contributions selected from a total of 116 submissions. The papers address all current aspects of database theory; they are organized in sections on optimization, nonmonotonic semantics,

blight

DATALOG queries with stratified negation and choice: from , to ,,,neral algorithm that ensures efficient execution for the different complexity classes. We thus obtain a class of DATALOG programs that preserves computational tractability, while achieving completeness for a wide range of complexity classes.

Soliloquy

Unified transaction model for semantically rich operations,asses of prefix reducible schedules and argue that serializability and atomicity can be unified by considering schedules from these classes. We also show that the previously proposed correctness criteria [MGG86a, MGG86b] and [RKS92, RKS93] are subsumed by our model.

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