Custom BSDF parser for .xml file


I am currently looking into the optical properties of complex fenestration and writing a custom-made data parser to extract information from a data-driven BSDF file.

I have been looking into the old forums online to find information about the BSDF .xml data structure, and I saw references to the BSDF parser library from Radiance. I would like to know if this library is still accessible and where to find it.

Thanks in advance,