To document a namespace used for identifiers within FHIR data types such as coding, which resource provides the namespace management?

• A. NamingSystem
• B. ValueSet
• C. ConceptMap
• D. DocumentManifest

Answer: (A)

Documenting the namespace used for identifiers in FHIR coding is handled by the NamingSystem resource. NamingSystem isBuilt to publish and manage naming systems, including the namespace for codes and identifiers, the official URL that identifies that namespace, and how to interpret or resolve the codes that belong to it. When a Coding element uses a system URL to indicate its namespace, the NamingSystem resource provides the authoritative description of that namespace so other systems can consistently understand and exchange the codes.

ValueSet, by contrast, lists which codes are allowed or used in a particular context from one or more code systems; it does not define the namespace itself. ConceptMap describes mappings between codes in different systems, not the namespace management. DocumentManifest groups and describes a set of documents, not coding namespaces.