Showing the relationship between different things is very important to do. However, you may find when you are using your computer it can be nearly impossible. This is when you may want to have more information about the ER1 - ERWin Entity Relationship Diagram and how you can be using this to show the relationships between all the different files which you are working with at any given period of time.
File Extension ER1
Product(s) that can open ER1 file
CA ERwin Data Modeler
CA ERwin Data ModelerCA ERwin Data Modeling is an industry-leading data modeling solution that provides a simple, visual interface to manage your complex data environment.