text: It is possible to specify more than one class as the domain or range of a property. One of the 
  most common mistakes of new users is to do this and expect that the resulting domain/range is 
  the union of the two classes. However, note that next to the Domain and Range in the 
  Description view it says (intersection). This is because the semantics of having 2 or more classes 
  as the domain or range is the*intersection*of those classes*not*the union. E.g., if one defined the 
  domain for a property to be Pizza and then added another domain IceCream that would 
  mean that for something to be in the domain of that property it would have to be an instance of 
  *both*Pizza*and*IceCream not (as people often expect) the*union*of those two sets which 
  would be*either*the class Pizza*or*the class IceCream. Also, note that the domain and range 
  are for inferencing, they are not data integrity constraints. This distinction will be explained in 
  more detail below in the section on SHACL. 