F.2 IFC4 Addendum 1 4.0.1.0

The first Addendum of the IFC4 release has the main scope to provide documentation improvements, resolve issues that had occurred since the official release of IFC4 in March 2013, and to addresses implementation issues and concerns.

The main change incorporated into IFC4 ADD1 schema is:

Minor corrections and improvements to the IFC4 ADD1 schema include:

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