Research Of Semantic-Based P2P Resource Sharing System In JXTA Platform

The Internet's phenomenal impact and subsequent growth stemmed primarily from the open, public, worldwide networking it offers. Most current applications, however, use client-server technologies that incorporate networking as an ancillary, Single point of failure and value-added feature, and limit resources sharing to some extent. It has been a hot issue about how to get useful and valuable information in the tremendous Internet.Nowadays a new integration concept based on the notion of Semantic Web is being developed. The concept assumes semantic annotation of Web resources and services to make them "understandable" by computers. On the other hand, emerging Peer-to-Peer technology and appropriate networks suite well to the increasingly decentralized nature of modern companies and their industrial and business processes. Some of the benefits of a P2P approach include: improving scalability by avoiding dependency on centralized points; eliminating the need for costly infrastructure by enabling direct communication among clients; and enabling resource aggregation.On the basis of P2P technology and Semantic Web relevant technologies, This paper proposes a kind of web resources search module based on the Ontology OCSD. To resolve the compatibility problem existing in the P2P systems, JXTA is adopted as a general P2P development platform. Based on the study on JXTA, this thesis chooses the Hybrid P2P network model. Peers organize themselves into peer groups in accordance with their common interests. Each group selects a rendezvous peer to respond to the outside request. All rendezvous peers interconnect, forming a overlay network. According to ACM classification standards, we build the peer knowledge ontology OCSD with the protege tool, which described by the W3C standards OWL ontology language, and select computer scientific document as its subject, reaching on the unified description and sharing of the P2P network resources; choose the RDF/RDFS markup language to achieve the semantic tagging of the shared resources, achieve Ontology reasoning and data query with the Jena tool in the specific field to ensure that the resources is understandable for the machine; design and preliminary imply the P2P resource sharing system ORSS based on semantic. There is a real sense of exploration to further develop and improve the resources searching and sharing technology.