The part of the data model describing the aspects of the health and care business with significant characteristics.

Within this publication, the names of Classes are styled like this: ACTIVITY.

A Class is something that you want to describe; the Attributes define the descriptive characteristics of the Class.

Classes within a data model may be refined into more specific classes. For example, both CLINICAL INVESTIGATION and CARE CONTACT are types of a CARE ACTIVITY, which in turn is a type of ACTIVITY.

Where there are no significant differences in the characteristics of a kind of Class, NHS Business Definitions are used to relate a particular business context to a use of a Class. For example, a Laparoscopy is a type of CLINICAL INVESTIGATION.