ReadonlylimitReadonlynameReadonlyperReadonlyvaluesAn enumerated field's legal values — declared as a mixed array because the wire enumerates
by VALUE, not by type: /clock/force's rate enumerates numbers, /clock/ownership's
role enumerates strings. The schema below reads the actual values to pick one JSON Schema
type rather than assuming string.
Readonlywritable
One field's declared travel, exactly as the REST reference already carries it.