Which statement best describes the version that tracks changes to the resource content itself (not tied to profiles or security)?

• A. Business Version
• B. Profile Version
• C. Security Version
• D. Release Version

Answer: (A)

In FHIR, versioning can be thought of as multiple lanes: one that tracks changes to the actual data in a resource, another that tracks changes to how resources are defined (profiles), and another for security-related metadata. The option that describes the version tracking changes to the resource content itself—i.e., the business state of the resource data—best fits this concept. This is often referred to as the business version, because it reflects updates to the resource’s data over time (captured by the resource’s versionId and lastUpdated). It is separate from profile versions, which pertain to StructureDefinition changes that constrain resources, and from security versions, which relate to policy changes. Release versions would refer to a version of the specification or implementation guide, not the resource’s data content.