This class represents a specialization of the Patient role declared in the FHIM Person Demographics domain in which Behavioral Health specific properties are added. "This domain refers to the client - the person who receives, or has received, Behavioral Health services and contains the core set of demographic information to be exchanged." - HL7 Behavioral Health Record DAM R2, Client Note that the Client class in the BH DAM contains a number of properties that the FHIM has modeled in other domains, in this case Person. These properties are included for completeness, but are marked as derivied as they would be retreived from the Person or Patient classes.