Represents a defined collection of entities that may be discussed or acted upon collectively but which are not expected to act collectively and are not formally or legally recognized. I.e. A collection of entities that isn't an Organization.

A unique business identifier for this group.

Allows the group to be referenced.

Identifies the broad classification of the kind of resources the group includes.

Identifies what type of resources the group is made up of.

If true, indicates that the resource refers to a specific group of real individuals. If false, the group defines a set of intended individuals.

There are use-cases for groups that define specific collections of individuals, and other groups that define "types" of intended individuals. The requirements for both kinds of groups are similar, so we use a single resource, distinguished by this flag.

Provides a specific type of resource the group includes. E.g. "cow", "syringe", etc.

This would generally be omitted for Person resources.

A label assigned to the group for human identification and communication.

Used to identify the group in human communication.

A count of the number of resource instances that are part of the group.

Group size is a common defining characteristic.

Identifies the traits shared by members of the group.

Needs to be a generic mechanism for identifying what individuals can be part of a group.

A code that identifies the kind of trait being asserted.

Need a formal way of identifying the characteristic being described.

The value of the trait that holds (or does not hold - see 'exclude') for members of the group.

The value of the characteristic is what determines group membership.

For Range, it means members of the group have a value that falls somewhere within the specified range.

If true, indicates the characteristic is one that is NOT held by members of the group.

Sometimes group membership is determined by characteristics not possessed.

This is labeled as "Is Modifier" because applications cannot wrongly include excluded members as included or vice versa.

Identifies the resource instances that are members of the group.

Often the only thing of interest about a group is "who's in it".