For objects that are built with prototypes or delegates or base objects and inherit from the base/prototype/delegate object, the base object may be referred to with the basis field. For example:
{"id":"corvette",
"basis":
{"id":"chevrolet",
"maker":"Chevrolet"}
"model":"Corvette"}
In this example object "corvette" would have model property of "Corvette" and would inherit the maker property of "Chevrolet" from object "chevrolet".