📁 3. What are resources?

FHIR represents healthcare information as small, reusable building blocks called resources. This unit explains the distinction between a resource type and an instance, how resources refer to one another, and how a Bundle can carry related resources together.

After this unit, you should be able to:

1. explain what a FHIR resource is without describing it as an app or database;
2. distinguish a resource type from a particular resource instance;
3. identify references between resources in a clinical story; and
4. explain why several resources may travel together in a Bundle.