摘要
在开放分布的网络环境中发现并获取空间信息服务是GIS领域研究的热点问题,而目前空间信息服务注册中心各自独立的现状造成跨领域查询困难,且缺少语义支持的服务匹配也造成服务查准率低,这些都成为制约其发展的瓶颈。提出了基于P2P和本体的空间信息服务注册模型PeerRegistry,首先描述了模型结构、内部模块和服务发布、发现流程,利用本体推理机在全局本体和局部本体映射的基础上进行服务匹配,实现了服务的自动发布和一站式服务发现,并通过创建语义路由表提高对等发现过程中消息传递的效率。
geospatial Web Services discovery and retrieval in open distributed environment is the hotspot of GIS research. Heterogeneous and distributed registries restrict cross domain service discovery. The lack of semantic supporting of service matching also cause low efficiency on services discovery. Here the registry model named PeerRegistry based on P2P and ontology was put forward. The architecture, inside modules, service register and discovery flow were designed. Based on ontology mapping between global ontology and local ontology, the reasoner could help with service matching. Finally automatic service registry and one-stop service discovery were achieve. Besides, PeerRegistry utilized creating semantic route table to improve message transport efficiency in remote discovery.
出处
《测绘科学技术学报》
北大核心
2009年第6期454-457,共4页
Journal of Geomatics Science and Technology
基金
国家科技支撑计划资助项目(2007BAH16B03-r3)
信息工程大学博士研究生论文基金
关键词
对等网
本体
空间信息服务
目录服务
服务发现
peer to peer
ontology
Geospatial Web Services
catalogue service
service discovery
