Distributed Reasoning in a Peer-to-Peer Setting: Application to the Semantic Web

Details Distributed Reasoning in a Peer-to-Peer Setting: Application to the Semantic Web Distributed Reasoning in a Peer-to-Peer Setting: Application to the Semantic Web

2011-09-26

arxiv.org/abs/1109.5716v1

Journal Of Artificial Intelligence Research, Volume 25, pages 269-314, 2006

Computer Science

Artificial Intelligence

Scientific paper

10.1613/jair.1785

In a peer-to-peer inference system, each peer can reason locally but can also solicit some of its acquaintances, which are peers sharing part of its vocabulary. In this paper, we consider peer-to-peer inference systems in which the local theory of each peer is a set of propositional clauses defined upon a local vocabulary. An important characteristic of peer-to-peer inference systems is that the global theory (the union of all peer theories) is not known (as opposed to partition-based reasoning systems). The main contribution of this paper is to provide the first consequence finding algorithm in a peer-to-peer setting: DeCA. It is anytime and computes consequences gradually from the solicited peer to peers that are more and more distant. We exhibit a sufficient condition on the acquaintance graph of the peer-to-peer inference system for guaranteeing the completeness of this algorithm. Another important contribution is to apply this general distributed reasoning setting to the setting of the Semantic Web through the Somewhere semantic peer-to-peer data management system. The last contribution of this paper is to provide an experimental analysis of the scalability of the peer-to-peer infrastructure that we propose, on large networks of 1000 peers.

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