By Wolfgang Nejdl (auth.), Karl Aberer, Manolis Koubarakis, Vana Kalogeraki (eds.)
Peer-to-peer(P2P)computingiscurrentlyattractingenormousmediaattention, spurred through the recognition of ?le sharing platforms reminiscent of Napster, Gnutella and Morpheus. In P2P structures a truly huge variety of self sustaining computing nodes (the friends) pool jointly their assets and depend upon one another for information and prone. The wealth of industrial possibilities promised through P2P networks has gene- ted a lot business curiosity lately, and has ended in the construction of assorted commercial tasks, startup businesses, and exact curiosity teams. Researchers from dispensed computing, networks, brokers and databases have additionally develop into desirous about the P2P imaginative and prescient, and papers tackling open difficulties during this sector have begun showing in high quality meetings and workshops. a lot of the hot learn on P2P structures seems performed by means of - seek teams with a chief curiosity in allotted computation and networks. This workshop focused on the impression that present database learn may have on P2P computing and vice versa. even though researchers in disbursed facts buildings and databases were engaged on comparable matters for a very long time, the constructed recommendations are easily now not enough for the hot paradigm.
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Additional info for Databases, Information Systems, and Peer-to-Peer Computing: First International Workshop, DBISP2P 2003 Berlin, Germany, September 7 - 8, 2003 Revised Papers
4 The Information Provider Model The metadata model presented in this section provides an annotation schema designed to support the definition of semantic overlay clusters by local domain experts within the Edutella Network. This model shows a set of attributes for a particular infrastructure. In a semantic overlay cluster environment the model is used for the identification of relevant information provider peers. It consists of 15 attributes, which are either extracted from the information provider peer automatically at runtime (Peer ID, Peer IP, Peer Domain, Completeness, Accuracy, Response Time, Amount of Data) or are manually defined by local domain experts (Peer Schema, Peer Name, Peer Description, Global Classification URI and Taxon Path).
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The selection condition in our template query is a simple conjunction of equality literals. More generally, the selection condition is a statement in disjunctive normal form, which consists one or more disjuncts each of which is a conjunction of one or more equality and/or inequality literals. First, to support conjunction of both equality and inequalities literals, the semantic distance function used with selective random walk should be customized as follows: where the distance function is normalized.
Databases, Information Systems, and Peer-to-Peer Computing: First International Workshop, DBISP2P 2003 Berlin, Germany, September 7 - 8, 2003 Revised Papers by Wolfgang Nejdl (auth.), Karl Aberer, Manolis Koubarakis, Vana Kalogeraki (eds.)