Web Services构架下的空间应用集成框架  

Spatial Applications Integrating Infrastructure Under Web Services

作　　者：王文俊[1] 罗英伟[1] 刘昕鹏[1] 张建伟[1] 付洪军[1] 汪小林[1] 许卓群[1] 

机构地区：[1]北京大学计算机科学技术系,北京100871

出　　处：《计算机辅助设计与图形学学报》2005年第5期1092-1100,共9页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金 ( 60 2 0 3 0 0 2 );国家"八六三"高技术研究发展计划( 2 0 02AA13 5 3 3 0;2 0 0 2AA13 40 3 0 );国家重点基础研究发展规划项目( 2 0 0 2CB3 12 0 0 0 );高校博士点基金(2 0 0 2 0 0 0 10 15 );北京市自然科学基金( 40 12 0 0 7)

摘　　要：基于XML ,WebService,Ontology等技术的PAI集成框架包括Web应用层、集成层、分布的服务层和分布的信息层4层 其中集成层含有集成总线及AdapterService、元数据库和集成协调器与供二次开发的API及WebSer vice工具集,它实现了数据互操作、软件互操作与语义互操作集成总线是一组面向领域的编码标准与通信协议,是集成框架的核心;与总线标准不符的遗留系统和其他相关系统只需编写AdapterService就能被集成;元数据库用于管理系统中的所有信息与应用服务,屏蔽信息及服务的分布性与异构性;集成协调器用于数据的更新和元数据的管理;Ontology用于定义描述领域相关元数据的术语;数据交换格式与通信协议均用XML定义;所有应用通过SOAP协议实现互操作该集成框架实现了大规模空间信息及服务的动态集成,能保护已有投资,并能集成网上丰富的商业WebService ,是一个开放的可扩充的框架 文中还介绍了PAI集成框架实现的初步成果。Some details of the design of PAI (Peking spatial Applications Integrating Infrastructure) based on mainstream information technologies such as XML, Web Service, ontology and metadata are presented. Many utilities are using PAI to integrate a variety of spatial databases, systems and business processes. PAI core consists of integrated bus, adapter services, metadata database, PAI mediator and PAI Toolkit. PAI Toolkit is composed of a series of API and Web services. Integrating bus is a group of domain-oriented encoding standards and communication protocols; Adapter service encapsulations are recommended as a good solution to integrate existing applications or systems into PAI; Metadata database is the key unit of PAI, which manages all data and services and shields heterogeneity and distribution of spatial data and spatial services; PAI mediator is positioned to manage metadata and update spatial data online; The terms used in metadata are defined in ontology description language OWL; All data and protocols are encoded in XML; One web service can operate other web services using SOAP protocol. At last, implement details of PAI are discussed, and also a case study of LBS service based on PAI is introduced.

关 键 词：集成框架 WEB SERVICES GML 空间信息及服务 元数据 本体 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]