对象关系数据仓库中的元数据管理     

彭丹 《科技广场》2007,(1):79-81

随着数据仓库(DW)和在线分析(OLAP)技术的发展,关系数据库的局限性越来越突出。而另一方面,对象关系数据库日益发展,促成了对象关系数据仓库的产生。本文主要介绍了建立在对象关系数据库基础上的数据仓库系统的元数据,并给出了一种新的元数据,用来实现从面向对象环境到关系环境的映射。  相似文献   

Object-relational data modelling for informetric databases     

Hairong Yu  Mari Davis  Concepcin S. Wilson  Fletcher T.H. Cole 《Journal of Informetrics》2008,2(3):240-251

Informetric researchers have long chafed at the limitations of bibliographic databases for their analyses, without being able to visualize or develop real solutions to the problem. This paper describes a solution developed to provide for the specialist needs of informetric researchers. In a collaborative exercise between the fields of computer science and informetrics, data modelling was used in order to address the requirements of complex and dynamic informetric data. This paper reports on this modelling experience with its aim of building an object-relational database (ORDB) for informetric research purposes. The paper argues that ORM (object-relational model) is particularly suitable because it allows for the modelling of complex data and accommodates the various data source formats and standards used by a variety of bibliographic databases. Further, ORM captures the dynamic nature of informetric data by allowing user-defined data types and by embedding basic statistical calculating tools as object functions in these user-defined data types. The main ideas of the paper are implemented in an Oracle database management system.  相似文献   

对象/关系映射在MIS开发中的应用     

杨成明  朱少强 《现代图书情报技术》2003,(4):62-63,73

对象持续化是软件编程中常见的需求，而“对象／关系映射”是处理对象持续化的一种常见模式。本文介绍了计算机编程中对象持续化及对象／关系映射的基本概念，并用一个开发实例说明了在普通的MIS系统中应用对象／关系映射的方法。  相似文献