摘要
A uniform metadata representation is introduced for heterogeneous databases, multi media information and other information sources. Some features about metadata are analyzed. The limitation of existing metadata model is compared with the new one. The metadata model is described in XML which is fit for metadata denotation and exchange. The well structured data, semi structured data and those exterior file data without structure are described in the metadata model. The model provides feasibility and extensibility for constructing uniform metadata model of data warehouse.
介绍一种对异质数据库、多媒体信息及其它信息源数据都适用的、统一的元数据表示模型 .通过分析元数据的有关特性 ,比较现有元数据模型的局限性 ,用适合进行元数据表示和交换的语言XML来描述该元数据模型 .该模型描述了结构化数据、半结构化数据及无结构化数据 ,具有可行性及可扩展性 .为数据仓库中构造一致的元数据模型提供了一个示例 .
