owl:topDataProperty under Data Property in Protege

Question

I'm not sure if this is a bug or something broken with my Protege but when I'm adding new value to a data property in Protege, suddenly an owl:topDataProperty will be under one of my data property as shown below.

Is it something wrong with my Protege or my ontology structure?

Answer 1

Looks like your property is inferred to be equivalent to owl:topDataProperty - and so it is both a superproperty and a subproperty of your property. We can't tell from this screenshot though, it's necessary to see the rest of the ontology.