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arXiv 0705.1456cs.DB
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Web数据仓库

Warehousing Web Data

Jérôme Darmont, Omar Boussaïd, Fadila Bentayeb

摘要:

在数据仓库过程中,掌握数据准备阶段可以在执行多维分析或使用数据采掘算法时在时间和性能方面获得实质性的收益。此外,数据仓库可能需要外部数据。在这种情况下,网络是一个普遍的数据源。在本文中,我们提出了一个建模过程,将不同的和异构的(所谓的多形式)数据集成到一个统一的格式。此外,模式定义在我们的数据仓库上下文中提供了一流的元数据。在概念层次上,一个复杂的对象用UML表示。我们的逻辑模型是一个XML模式,可以用DTD或XML-Schema语言描述。最后,我们设计了一个Java原型,它将我们的多种形式的输入数据转换为表示我们的物理模型的XML文档。然后,我们获得的XML文档被映射到一个关系数据库中,我们将其视为ODS(操作数据存储),其内容必须以多维方式重新建模,以允许其存储在基于星型模式的仓库中,并在以后进行分析。

英文摘要:

In a data warehousing process, mastering the data preparation phase allows substantial gains in terms of time and performance when performing multidimensional analysis or using data mining algorithms. Furthermore, a data warehouse can require external data. The web is a prevalent data source in this context. In this paper, we propose a modeling process for integrating diverse and heterogeneous (so-called multiform) data into a unified format. Furthermore, the very schema definition provides first-rate metadata in our data warehousing context. At the conceptual level, a complex object is represented in UML. Our logical model is an XML schema that can be described with a DTD or the XML-Schema language. Eventually, we have designed a Java prototype that transforms our multiform input data into XML documents representing our physical model. Then, the XML documents we obtain are mapped into a relational database we view as an ODS (Operational Data Storage), whose content will have to be re-modeled in a multidimensional way to allow its storage in a star schema-based warehouse and, later, its analysis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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