document: Semantic link based top-K join queries in P2P networks An important issue arising from Peer-to-Peer applications is how to accurately and efficiently retrieve a set of K best matching data objects from different sources while minimizing the number of objects that have to be accessed . This paper resolves this issue by organizing peers in a Semantic Link Network Overlay , where semantic links are established to denote the semantic relationship between peers ' data schemas . A query request will be routed to appropriate peers according to the semantic link type and a lower bound of rank function . Optimization strategies are proposed to reduce the total amount of data transmitted .
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