True/False: The metadata items are all required, though some or all of them may be optional in particular implementations or contexts of use.

• A. True
• B. False
• C. Sometimes
• D. Not specified

Answer: (B)

Metadata in FHIR is not required across all cases. The Meta element, which carries fields like versionId, lastUpdated, profile, security, and tag, is defined as optional in the base specification. This means a resource can be valid without any metadata, and a server may populate metadata during create or update, but there is no universal requirement that every metadata item must be present in every implementation or context.

In practice, whether metadata appears can depend on the profile or policy in use. A profile might specify that certain metadata must be present (for conformance or auditing reasons), but that requirement comes from the profile, not from a blanket rule in the base standard. Without such a profile constraint, metadata items are optional.