A Comparison of Two Approaches to Splitting Default Theories

Grigoris Antoniou

Default logic is computationally expensive. One of the most promising ways of easing this problem and developing powerful implementations is to split a default theory into smaller parts and compute extensions in a modular, "local" way. This paper compares two recent approaches, Turner’s splitting and Cholewinski’s stratification. It shows that the approaches are closely related - in fact the former can be viewed as a special case of the latter.

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