Concept hierarchies greatly help in the organization and reuse of information. Multidimensional, hierarchy-organized data are widely used in a variety of applications, such as data warehousing, mining network data, etc. In the HiPPIS (Hierarchical Peer-to-Peer Indexing System) project, we investigate methods for efficiently storing and querying multidimensional data organized into concept hierarchies and dispersed over a network.

• Papers
  • A. Asiki and K. Doka and D. Tsoumakos and N. Koziris: Support for Concept Hierarchies in DHTs. In Proceedings of 8th International Conference on Peer-to-Peer Computing, Aachen University , Germany , 8-11 September 2008
  • K. Doka and D. Tsoumakos and N. Koziris: HiPPIS: An Online P2P System for Efficient Lookups on d-Dimensional Hierarchies. In Proceedings of the 10th International Workshop on Web Information and Data Management, Napa Valley, California, 26-30 October 2008
  • K. Doka and A. Assiki and D. Tsoumakos and N. Koziris: Online Querying of Concept Hierarchies in P2P Systems. In Proceedings of the 16th International Conference on Cooperative Information Systems, Monterrey, Mexico, 12-14 November 2008
  • A. Asiki and D. Tsoumakos and N. Koziris: An Adaptive Online System for Efficient Processing of Hierarchical Data. In Proceedings of International ACM Symposium on High Performance Distributed Computing (HPDC 2009), Munich, Germany, June 11-13, 2009

• People
  • A. Asiki and K. Doka
  • D. Tsoumakos