Which resource is an example of workflow instance?

• A. CodeSystem
• B. ExampleScenario
• C. OperationDefinition
• D. SearchParameter

Answer: (B)

Understanding how a real process is shown in FHIR is key here: a workflow instance is a concrete example of how a set of steps unfolds in practice, including who does what, when, and with what data. ExampleScenario is built to capture exactly that kind of real-world sequence. It lets you model a complete workflow from start to end, showing activities, actors, events, and data exchanged, so teams can visualize, test, and communicate how the process should work in a real setting.

The other resources serve different purposes. A CodeSystem defines a vocabulary of codes that can be used across resources, not a running process. An OperationDefinition describes how a specific operation or API call should behave—the rules and parameters of an action, not an instance of processes. A SearchParameter defines how to constrain or customize searches, which is about querying data rather than illustrating a workflow.

So, ExampleScenario is the resource that best exemplifies a workflow instance by providing a runnable-like depiction of a complete workflow with its steps and participants.