Type Alias: ReferenceRangeKind

ReferenceRangeKind = "closed" | "open-low" | "open-high" | "unparsed"

The shape of a parsed reference range.

• closed: both a low and a high bound (3.5-5.0).
• open-low: an upper bound only (<5), so everything at or below high.
• open-high: a lower bound only (>10), so everything at or above low.
• unparsed: the text did not match a recognized form; both bounds are absent and the raw text is surfaced. A bound is never fabricated.