(This is for setting some elevator parameters)

I wonder if there are terms to differentiate the number of a floor marked on each floor from the actual floor number considered a part of the whole structure.

For example, for a building that has a basement, the basement might be marked as B1, and the first floor might be marked as F1. But they can also be considered respectively as the first floor and second floor of the whole building structure.
I did some research online, but because I am totally clueless on this matter, I found nothing about this.

I wonder if there are terms for these two floor numbering methods in the field of architecture. For example, something along the lines of nominal floor and structural floor (I made them up. I just want you to get a rough idea as to what I am looking for)

Thanks.