There is a standard format for data exchange [1], what became BIM didn't have to be different to it but at least they kept the geometry definitions. [1] https:

There is a standard format for data exchange [1], what became BIM didn't have to be different to it but at least they kept the geometry definitions. [1] https://en.wikipedia.org/wiki/ISO_10303 https://en.wikipedia.org/wiki/ISO_10303