A systematic software development method named Model oriented Transformational Software Development Method is proposed in this paper. In this method, data abstraction is enhanced to language abstraction; 该文提出了一种系统的软件开发方法&面向模型的变换型软件开发方法.这种方法把数据抽象的思想提高到语言抽象层次;
Thirdly, it illustrates the establishment and normalization of relational data database, the classification and coding of information and abstraction of data by oriented-object program language. 然后论述了医护系统关系数据库的建立及其规范化,并详细讨论了信息的分类与编码的原则在本系统中的应用,以及采用面向对象语言对数据库关系模式的数据抽象实现。