OLAP中文本文件建模

在联机分析处理中,由于传统的模型无法对文本文件进行建模,因此提出了基于维概念的星系模型。该模型删除了事实的概念,消除了只能把事实作为分析主题的限制,令联机分析更加自由;而且引入了联系的概念,实现了对文本文件中的超链接进行建模。通过两种方法可以把星型模型中的事实转换成星系模型中的维,实现了星系模型与其他模型之间的转换。

The Text Files Modeling in OLAP

In the online analytical processing,a new type of galaxy schema based on dimension was proposed as the traditional one could not model the text file.The schema removed the concept of fact,eliminating the limit of the analyzed subject only by facts and making online analysis more flexible,moreover introduced the concept of contact to model a hyperlink in the text file.Finally,two methods were exploited to transform the fact of star schema into the dimension of galaxy schema,achieving the conversion between the galaxy schema and other types of schema.