High Quality Content by WIKIPEDIA articles! CA ERwin Data Modeler (ERwin) is a software tool for data modeling (data requirements analysis, database design etc) of custom developed information systems, including databases of transactional systems and data marts. ERwin's data modeling engine is based upon the IDEF1X method, although it now supports diagrams displayed with information engineering notation as well. ERwin was created by Logic Works. It was acquired in 1998 by Platinum Technology, which was later acquired in May 1999 by Computer Associates, who added it to their AllFusion suite under the name AllFusion ERwin Data Modeler. Logic Works companion products include BPwin, an IDEF0 process modeling tool and ModelMart to support group (collaborative) development of both data and process models. The tool was later renamed to CA ERwin Model Manager.

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