er1文件扩展名，er1文件怎么打开？

.er1

文件类型：ERWin Entity Relationship Diagram

扩展名为.er1的文件是一个数据文件。

文件说明：

Entity relationship diagram created by ERWin, a data modeling program published by Computer Associates (CA); used for visualizing data structures and managing data complexities.

CA ERWin Data Modeler was previous known as AllFusion ERwin Data Modeler..er1                                                                    

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