* The current version is GSIM v1.2. The links below are to outdated versions of the GSIM, retained for archive purposes only.  

• GSIM v1.2 (April 2019)
• GSIM v1.1 (December 2013)
  
  • Clickable GSIM 1.1
• Version 1.0 (December, 2012)
• Version 0.8 (September, 2012)
• Version 0.4 (May, 2012) released for public comment
• Version 0.3 (March, 2012)
• Version 0.1 GSIM Common Reference Model (June, 2011)
  
• Past workshops on GSIM development