数据元素的标准化方法(4)——数据元素的提取

Method on Data Element Standardization (4)——Extraction of Data Element

阐述了数据元素及其基本属性的提取方法。首先详细描述了适用于预建信息系统提取数据元素的"自上而下"提取法,接着给出了适用于已建信息系统的"自下而上"提取法,最后描述了提取数据元素基本属性的步骤。

This paper describes the extraction of data element and its attributes. First it introduces the ＂top-down＂ method which is applied to the prebuilding information system in detail; secondly it gives the ＂down-top＂ method which is applied to the existing information system; at last it gives the steps of extracting data element attributes.