File Type Generic IconERWin Entity Relationship Diagram
File Format Proprietary (Computer Associates)
Usage Open manually
Popularity ★ ★ ★ ☆ ☆  Average

An ER1 file is a diagram created with ERWin Data Modeler. It provides a visual representation of relationships between different sets of data.

ERWin Data Modeler is used for creating and maintaining databases and visualizing complex data structures. It can help streamline the design process and synchronizes data models with database design. Before being acquired by Computer Associates, ERWin was called AllFusion ERwin Data Modeler.

Open With

IconCA ERWin Data Modeler

Updated May 26, 2009
Information from the PC File Extensions Reference