In census records race is clearly shown, but in other records ... not so much. I am seeing where persons of the same name, but different races, have been merged. Would it be a no-no to include a space for race in a person's PID?
The New Source Linker allows you to bring over the Race designator from those records that have it, if you wish.
The PID is the seven-character string identifying a profile; I think you meant "in a person's profile" -- and yes, this feature already exists.
This is on the profile's Details page, in the Other Information box under "Facts" (i.e., you click "Add Fact" to get this list).