1引言
联机分析处理(On Line Analyze Processing:0LAP)是决策支持系统的重要组成部分,它为企业管理人员提供了利用集成化的数据仓库进行更准确、更完整的信息查询的能力.数据仓库是支持企业或组织决策分析处理的,拥有面向主题的、集成...1引言
联机分析处理(On Line Analyze Processing:0LAP)是决策支持系统的重要组成部分,它为企业管理人员提供了利用集成化的数据仓库进行更准确、更完整的信息查询的能力.数据仓库是支持企业或组织决策分析处理的,拥有面向主题的、集成的、相对稳定的数据集合.在数据仓库的联机维护中,只有保证数据仓库数据与数据源的一致性,才能为高层决策人员提供全面一致、有效的分析型战略数据信息.展开更多
Extensible markup language(XML) has become the de facto standard for representing and interchanging data in web-based applications.And XML view,a virtual window for specified users,has been widely applied.In practical...Extensible markup language(XML) has become the de facto standard for representing and interchanging data in web-based applications.And XML view,a virtual window for specified users,has been widely applied.In practical systems,users encounter the so-called view update problem when they need update source data through the view.For a long time,the view update problem is an open question in database community.With the development of various data models,the corresponding view update problem has been widely researched.In this paper,we introduce the conception of view update problem.We survey and compare previous approaches.Especially,we emphasize the role of semantics.Focusing on the problem in XML context,we give a discussion and propose a framework,which collects the semantic information at view definition time.Some related techniques for implementing this framework are further introduced.展开更多
文摘1引言
联机分析处理(On Line Analyze Processing:0LAP)是决策支持系统的重要组成部分,它为企业管理人员提供了利用集成化的数据仓库进行更准确、更完整的信息查询的能力.数据仓库是支持企业或组织决策分析处理的,拥有面向主题的、集成的、相对稳定的数据集合.在数据仓库的联机维护中,只有保证数据仓库数据与数据源的一致性,才能为高层决策人员提供全面一致、有效的分析型战略数据信息.
基金supported by the Beijing Municipal Natural Science Foundation under Grant No. 4082003
文摘Extensible markup language(XML) has become the de facto standard for representing and interchanging data in web-based applications.And XML view,a virtual window for specified users,has been widely applied.In practical systems,users encounter the so-called view update problem when they need update source data through the view.For a long time,the view update problem is an open question in database community.With the development of various data models,the corresponding view update problem has been widely researched.In this paper,we introduce the conception of view update problem.We survey and compare previous approaches.Especially,we emphasize the role of semantics.Focusing on the problem in XML context,we give a discussion and propose a framework,which collects the semantic information at view definition time.Some related techniques for implementing this framework are further introduced.
