基于特征的二维视图描述参数化建库方法研究

Research on creating the parametric lib of graphis two-dimension based on feature

借鉴ＳＴＥＰ提供的思想与方法学，提出了二维视图特征类库的思想，在二维特征分类基础上。

The idea of feature library in two dimension is proposed which absorbs the thoughts and methods about STEP.Adopting the information modeling language EXPRESS, the parametric representation schema of the feature based on the classifacation is introduced,too.