OptionalforbiddenPropertySet ids the type must not include. Surfaces as
OBJECT_FORBIDDEN_PROPERTY_SET.
OptionallabelOptionalrequiredPropertySet ids the type must include. Missing surfaces as
OBJECT_REQUIRED_PROPERTY_SET_MISSING.
OptionalsuperSingle-inheritance super-type id. Resolved recursively against DataFormatSchema.objectTypes.
Spec for one DataObject type.