【摘要】 由于缺少形式化的数据模型语义描述方法,数据映射主要依靠人工完成,其效率低、质量差.以标准数据元为语义基本元素,提出一种形式化的数据模型语义描述方法.通过对数据元附加应用约束条件,建立对数据模型中数据项的语义描述;以数据项为基本单元,通过附加关系表的应用场景约束条件,建立关系表的语义描述;提出基于XML的数据模型语义描述格式.更多还原

【Abstract】 For the lack of formal semantic description for data model, data model mapping is usually performed by human beings, with lower efficiency and poor quality. With standard data element as basic semantic element, a formal approach is presented to describe the semantics of data model. Adding application constraints of data item to data element, semantic description is defined for data item in data model. Adding application context constraints to relational table and assembling semantics of the data item, the semantics of relational table is defined. A structure based on XML is defined to record the semantics of data model.更多还原