On behalf of the customer:
We currently have 3 reference points in Revit:
Revit Internal Origin, Project Survey Point and Project Base Point.
Project Base Point is used as a reference for the levels inside the building (ceiling levels, floor levels, etc.). Also for description tags. Project Base Point is set at ground floor level, for example. Floor tags at higher levels are easy to verify.
For multiple buildings it would be good if you could have more than one Project Base Point. In this way, for buildings with two or more offset reference levels, it would be easier to provide floor levels, floors etc.
