The Second Addendum of the IFC4 release has the main scope to provide improvements to geometry issues that had been reported during the implementation of IFC4 and IFC4 Addendum 1. It resolves these issues and addresses further implementation issues and concerns.

The main changes incorporated into IFC4 ADD2 schema are:

Minor corrections and improvements to the IFC4 ADD1 schema include:


Minor corrections after release of IFC4 Add2 schema include:

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