Data Extraction Model

First, we cover creating an infrastructure or an object model that starts with a request, access definition, and column maps for data extraction.

首先，我们创建一个基础或者对象模型，从分析需求、访问定义，以及数据提取的列映射开始。

Specially, the paper presented the creating of dimension table, fact table of multi-dimension data model, analyzed the construction of data model, data extraction and data maintenance tools.

其中重点介绍了多维数据模型的维表、事实表的结构设计，分析了数据模型的构建、数据抽取工具和数据维护工具的设计及实现。

This model including three modules: the data pretreatment, the attribute reduction and the rule extraction, then confirms this model's feasibility using the example.

该模型包括数据预处理、属性约简和规则提取三个模块，并利用算例验证该模型的可行性。