This is particularly true in the case of person-centered records, which are impractical to maintain if not electronic (thus difficult to centralize or federate).
It is involved in network research, in areas such as carrier class network technologies, photonic switching, federated network architectures and virtualisation.
A global schedule is the unified schedule of all the individual database (and other transactional object) schedules in a multidatabase environment (e.g., federated database).