1. Eclipse modeling project,
http://www.eclipse.org/modeling
2. EDIF, Electronic Design Interchange Format,
http://en.wikipedia.org/wiki/EDIF
3. Mesquite software,
http://www.mesquite.com
4. Puma project: Core scenario model,
http://www.sce.carleton.ca/rads/puma/
5. Electronics Industries Association. CDIF - CASE Data Interchange Format Overview, EIA/IS-106 (1994)