(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 (March 1999)
* IFC 1.5.1 (September 1998)
* IFC 1.5 (November 1997)
* IFC 1.0 (June 1996)

File formats

IFC defines multiple file formats that may be used, supporting various encodings of the same underlying data.

* IFC-SPF is a text format defined

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