Epicentre视图字典的创建

Establishment of epicentre view dictionary

按照Epicentre视图的总体构思 ,采用统一模型语言UML描述了视图字典创建的过程 ;从数据模型的表达方法上分析了Epicentre模型特点 ,提出了一套从关系型的外部模式到面向对象型的Epicentre模型的映射规则 ;遵循这套规则 ,应用程序可以将外部模式数据存入到Epicentre中 ,也可从Epicentre中提取数据并组织成外部数据模式 ;

Accroding to the general design of epicentre view, the paper analyses the description method of Epicentre model, and puts forward a mapping rule from relative external mode to Epicentre model which is object\|orient mode. According to the rule, the external mode data are put into epicentre model and the epicentre data transformed into external mode data by application. Furthermore the data dictionary that is a set of data structure and creating process for the data dictionary are described by using UML in the paper.