What is one method to identify a FHIR resource?

• A. By a Location URL that identifies where it can be accessed based on the 'Logical ID' (Server ID)
• B. By the resource name
• C. By the timestamp
• D. By the owner's name

Answer: (A)

In FHIR, a resource is uniquely identified by the URL that points to its location on a server, which is built from the resource type and its logical (server-assigned) ID. This means you access a specific resource with a path like baseURL/ResourceType/ID (for example, /Patient/12345) and, if needed, can reference a specific version with /_history/Version. After creating a resource, servers often return a Location header containing this exact URL, showing where the resource can be accessed. The other options don’t provide a unique, retrievable identity for a specific resource: a generic resource name isn’t enough to pinpoint a single instance, a timestamp isn’t unique, and an owner’s name doesn’t identify a particular resource.