Semantic query routing and processing in p2p database systems: the ICS-FORTH SQPeer middleware

  • Authors:
  • George Kokkinidis;Vassilis Christophides

  • Affiliations:
  • Institute of Computer Science, FORTH, Vassilika Vouton, Heraklion;Department of Computer Science, University of Crete, Heraklion, Greece

  • Venue:
  • EDBT'04 Proceedings of the 2004 international conference on Current Trends in Database Technology
  • Year:
  • 2004

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Abstract

Peer-to-peer (P2P) computing is currently attracting enormous attention In P2P systems a very large number of autonomous computing nodes (the peers) pool together their resources and rely on each other for data and services More and more P2P data management systems rely nowadays on intensional (i.e schema) information for integrating and querying peer bases Such information can be easily captured by emerging Semantic Web languages such as RDF/S However, a fully-fledged framework for evaluating semantic queries over peer RDF/S bases (materialized or virtual) is missing In this paper we present the ICS-FORTH SQPeer middleware for routing and processing RQL queries and RVL views The novelty of SQPeer lies on the use of intensional active schemas for determining relevant peer bases, as well as, constructing distributed query plans In this context, we consider optimization opportunities for SQPeer query plans.