【摘要】 针对分布式异构数据库的跨数据库联合检索和自动发布问题,构建基于XML和Web Services技术的数据库服务系统。该系统框架由元数据应用管理、数据库自动发布和跨数据库联合检索模块构成。参考科学数据库核心元数据标准,开发元数据管理工具,并设计基于元数据的数据库在线自动发布及导航目录服务系统。该系统以工程化学数据库为案例并得到应用,实现其多个数据库的资源共享与数据集成服务。更多还原

【Abstract】 In order to solve the problems of data retrieval from distributed and/or heterogeneous databases and automatic publication of these databases.A database services framework,which,composed of metadata management module,database automatically-publishing module and multi-databases searching module,and based on Web services and XML technology,is proposed.A metadata management tool is developed,by introducing the Scientific Database Core Metadata(SDBCM),to design metadata-based databases navigation with which a new database can be published automatically in website.As a case study,this system is applied in Engineering Chemistry Da- tabase(ECDB),to implement the service of resource-sharing and data-integration.更多还原