At its core, FHIR contains two primary components:

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Multiple Choice

At its core, FHIR contains two primary components:

FHIR centers on two ideas: a set of modular data units called resources, and a standardized API to access those resources. Resources are the building blocks that model real-world clinical data—things like Patient, Observation, or Medication. They provide a consistent structure and semantics so data from different systems can be understood together. The API layer defines how to interact with those resources over the web, typically using RESTful operations (create, read, update, delete, and search). This combination—resources as the data units plus APIs as the access mechanism—lets systems exchange meaningful information in a flexible, interoperable way. That’s why this option fits best: it highlights resources as the data units and APIs as the access method. Other options mix in elements like terminologies or profiles, which are important parts of FHIR but not the two primary components described here.

FHIR centers on two ideas: a set of modular data units called resources, and a standardized API to access those resources. Resources are the building blocks that model real-world clinical data—things like Patient, Observation, or Medication. They provide a consistent structure and semantics so data from different systems can be understood together. The API layer defines how to interact with those resources over the web, typically using RESTful operations (create, read, update, delete, and search). This combination—resources as the data units plus APIs as the access mechanism—lets systems exchange meaningful information in a flexible, interoperable way.

That’s why this option fits best: it highlights resources as the data units and APIs as the access method. Other options mix in elements like terminologies or profiles, which are important parts of FHIR but not the two primary components described here.

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