| 引用本文: | 刘震,邓苏,罗雪山,等.语义对等网中资源元数据混合索引策略研究.[J].国防科技大学学报,2006,28(6):95-101.[点击复制] |
| LIU Zhen,DENG su,LUO Xueshan,et al.Research on Hybrid Indexing Strategy of Resource Metadata in Semantic Peer-to-peer Network[J].Journal of National University of Defense Technology,2006,28(6):95-101[点击复制] |
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| 语义对等网中资源元数据混合索引策略研究 |
| 刘震, 邓苏, 罗雪山, 黄宏斌 |
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(国防科技大学 信息系统与管理学院，湖南 长沙 410073)
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| 摘要: |
| 面向对等网络信息资源语义共享问题，首先提出了一种基于多本体的资源元数据描述框架，将资源元数据分为核心和扩展两部分，在此基础上重点对资源元数据索引策略进行了研究，提出了一种混合索引机制，针对资源核心元数据采用一种社区策略来进行组织索引，针对扩展元数据采取DHT和语义关联相结合的方式进行组织索引，其中结合了本地索引和全局索引的特点，并在此基础上对资源发现流程和负载均衡方法进行了设计。与现有相关系统相比，本索引体系有效地提高了对等网络环境下资源定位的效率和系统的可扩展能力。 |
| 关键词: 对等网 本体 元数据 资源索引 |
| DOI： |
| 投稿日期：2006-05-18 |
| 基金项目:国家863高技术基金资助项目(2002AA131010) |
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| Research on Hybrid Indexing Strategy of Resource Metadata in Semantic Peer-to-peer Network |
| LIU Zhen, DENG su, LUO Xueshan, HUANG Hongbin |
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(College of Information System and Management, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| For the problem of semantic content sharing of information resources in P2P networks, this paper first proposes a multiple-ontology based resource metadata description framework, which divides resource metadata into core metadata and extensional metadata. Then, based on the metadata framework, this paper places emphasis upon the research of indexing strategy of resource metadata. A hybrid indexing architecture is provided. It uses community strategy to organize core metadata element and uses DHT and semantic association to index extensional metadata element, which combines local indexing and global indexing. Based on this indexing strategy, the work flow of resource discovery and the load balance strategy are designed. Compared with the related current systems, this indexing architecture will greatly improve the efficiency of resource discovery and the system's scalability. |
| Keywords: peer-to-peer ontology metadata resource indexing |
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