IFC/ifcXML Specifications
- IFC2x4 release (publicly announced as IFC4) (Release Candidate 4 as of 3 September 2012)
- ifcXML2x3 (June 2007)
- IFC2x3 (February 2006)
- ifcXML2 for IFC2x2 add1 (RC2)
- IFC2x2 Addendum 1 (July 2004)
- ifcXML2 for IFC2x2 (RC1)
- IFC 2x2
- IFC 2x Addendum 1
- ifcXML1 for IFC2x and IFC2x Addendum 1
- IFC 2x
- IFC 2.0
- IFC 1.5.1
- IFC 1.5
Read more about this topic: Industry Foundation Classes