Foundations of Aggregation in Deductive Databases

  title={Foundations of Aggregation in Deductive Databases},
  author={Allen Van Gelder},
As a foundation for providing semantics for aggregation within recursion, the structure of subsets of partially ordered domains is studied. We argue that the underlying cause of many of the di culties encountered in extending deductive database semantics to include aggregation is that set construction does not preserve the structure of the underlying domain very well. We study a binary relation < that is stronger than the standard , contrasting its properties on domains with di ering amounts of… CONTINUE READING
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