Decomposition of distributed nonmonotonic multi-context systems

  • Authors:
  • Seif El-Din Bairakdar;Minh Dao-Tran;Thomas Eiter;Michael Fink;Thomas Krennwallner

  • Affiliations:
  • Institut für Informationssysteme, Technische Universität Wien, Vienna, Austria;Institut für Informationssysteme, Technische Universität Wien, Vienna, Austria;Institut für Informationssysteme, Technische Universität Wien, Vienna, Austria;Institut für Informationssysteme, Technische Universität Wien, Vienna, Austria;Institut für Informationssysteme, Technische Universität Wien, Vienna, Austria

  • Venue:
  • JELIA'10 Proceedings of the 12th European conference on Logics in artificial intelligence
  • Year:
  • 2010

Quantified Score

Hi-index 0.00

Visualization

Abstract

Multi-Context Systems (MCS) are formalisms that enable the inter-linkage of single knowledge bases, called contexts, via bridge rules. Recently, a fully distributed algorithm for evaluating heterogeneous, nonmonotonic MCS was described in [7]. In this paper, we continue this line of work and present a decomposition technique for MCS which analyzes the topology of an MCS. It applies pruning techniques to get economically small representations of context dependencies. Orthogonal to this, we characterize minimal interfaces for information exchange between contexts, such that data transmissions can be minimized. We then present a novel evaluation algorithm that operates on a query plan which is compiled with topology pruning and interface minimization. The effectiveness of the optimization techniques is demonstrated by a prototype implementation, which uses an off-the-shelf SAT solver and shows encouraging experimental results.