Interface: SN

HL7 v2 Structured Numeric (SN) composite. num1 and num2 are ALWAYS-PRESENT keys (typed number | undefined) so callers can destructure uniformly, mirroring NM; comparator and separatorOrSuffix are OMITTED when absent (exactOptionalPropertyTypes).

An absent comparator means the default = relation per HL7 Chapter 2A. This library surfaces the structure only: it does not evaluate the inequality, validate the unit, or convert values.

Example

import type { SN } from "@cosyte/hl7";
const gfr: SN = { comparator: ">", num1: 90, num2: undefined };       // >90
const range: SN = { num1: 100, separatorOrSuffix: "-", num2: 200 };   // 100-200

Properties

comparator?

readonly optional comparator?: string

SN.1 comparator: one of > < >= <= = <>. Omitted ⇒ default =.

---

num1

readonly num1: number | undefined

SN.2 first numeric value. undefined when absent or non-numeric (never NaN).

---

num2

readonly num2: number | undefined

SN.4 second numeric value. undefined when absent or non-numeric (never NaN).

---

separatorOrSuffix?

readonly optional separatorOrSuffix?: string

SN.3 separator/suffix: - (range), :// (ratio), + (suffix), .. Omitted when absent.