Represents the act of maintaining information about the registration of its associated registered subject. The subject can be either an Act or a Role, and includes subjects such as lab exam definitions, drug protocol definitions, prescriptions, persons, patients, practitioners, and equipment.

The registration may have a unique identifier - separate from the unique identification of the subject - as well as a core set of related participations and act relationships that characterize the registration event and aid in the disposition of the subject information by a receiving system. Usage notes: