Function: isA()

isA(sub, code, anchor): boolean

True when code is-a anchor - the same code, or a (transitive) descendant of it.

Parameters

sub

Subsumption

The subsumption index (from buildSubsumption).

code

string

The candidate code.

anchor

string

The ancestor code to test against.

Returns

boolean

Whether code is anchor or a descendant of it.

Example

import { loadCodeSystem, buildSubsumption, isA } from "@cosyte/terminology";

const cs = loadCodeSystem({
  format: "fhir",
  resource: { resourceType: "CodeSystem", concept: [{ code: "p", concept: [{ code: "c" }] }] },
});
isA(buildSubsumption(cs), "c", "p"); // => true