kCFTaggedObjectID_Atom = (0 << 1) + 1,
    kCFTaggedObjectID_Undefined3 = (1 << 1) + 1,
    kCFTaggedObjectID_Undefined2 = (2 << 1) + 1,
    kCFTaggedObjectID_Integer = (3 << 1) + 1,
    kCFTaggedObjectID_DateTS = (4 << 1) + 1,
    kCFTaggedObjectID_ManagedObjectID = (5 << 1) + 1, // Core Data
    kCFTaggedObjectID_Date = (6 << 1) + 1,
    kCFTaggedObjectID_Undefined7 = (7 << 1) + 1,
};
*/