Type Alias: UnmappedMode

UnmappedMode = "provided" | "fixed" | "other-map" | "none"

The FHIR R4 group.unmapped.mode an unmapped source fell through to - the map author's declared fallback behavior. Surfaced (never silently acted on): the caller decides whether to trust a fallback.

• provided - echo the source code as the target (the map declares no real mapping).
• fixed - a single fixed fallback code the map declares for all unmapped sources.
• other-map - consult the referenced ConceptMap (which this engine does not auto-follow).
• none - no group.unmapped directive applied (plain no-match, or an explicit unmatched).