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IFC2x4 Release Summary

The IFC4 release (formerly known as IFC2x4), combines a number of feature increases with some major rework and improvements of the existing IFC specification. It has been developed as the next basis for IFC enabled interoperability of Building Information Models. The IFC4 release is submitted to the International Standardization Organization (ISO) for approval as a full International Standard ISO16739.

 

see the IFC roadmap for the up-to-date release schedule

 

see the unveiling of IFC2x4 overview presentation highlighting the news
of IFC2x4


The sources of new features, schema improvements and corrections are:

  • buildingSMART extension development projects within the following areas:
    • CI-3, the "IFG" project, developing extensions to connect the BIM/IFC schema to information held in GIS databases, the project contributed extension work to provide such connection from the IFC model (this project has been supported by the Norwegian buildingSMART forum);
    • XM-7, the "IFD" project, developing the link to external dictionaries and libraries for both, elements and properties within the IFC model (this project has been supported by the Norwegian buildingSMART forum);
    • EL-2, the project defining additions and improvements, for the part of IFC dealing with the electrical design (this project has been supported by the Norwegian buildingSMART forum);
    • PM-4, the project defining model based quantities, for providing extensive refinement work of quantity use definitions (this project has been supported by the German speaking buildingSMART chapter),
    • and FM-10, the project dealing with the use of BIM information for the handover into facility management (this project has been supported by the German ZukunftBAU research initiative and by the US COBIE project);
  • the feedback from the actual IFC implementation work, mainly provided by the buildingSMART Implementation Support Group (ISG) and the buildingSMART European Structural Implementation Group
  • the internal review and improvement work by the buildingSMART Model Support Group (MSG) dedicated to continuous improvement of the IFC specification