The NIST IFC File Analyzer now supports IFC4.3_RC4 in addition to IFC2X3, IFC4, and IFC4.2. Support for other versions of IFC can be added. Google “IFC File Analyzer” to find the website.
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Thanks Robert for this update !!!
@robertlipman we also have a link in the Software Implementations - buildingSMART Technical. I’ll update the capability listing accordingly.
You should also check out IFC4.3.0.1 Documentation (buildingsmart.org) for the latest version of the 4.3 spec of the Production Standard