📘 Validated against the IATA SSIM, March 2012 edition. Have access to a newer edition? Open an issue and we'll incorporate the diff.
iata-ssim

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iata-ssimParsers for IATA SSIM data formats

Zero-dependency, type-safe TypeScript parsers.

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Schedule Data Set
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Roadmap
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Schedule Data Set

Full IATA SSIM § 7.5 coverage — Header, Carrier, Flight Leg, Segment Data, Trailer records.

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Universal

Pure-string API. No Node-only built-ins — runs in browsers, edge functions, Workers, Deno.

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Typed and raw

Get decoded values (Date, time, day arrays, UTC offsets) alongside the original 200-byte raw lines for verification.

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SSM / ASM / SCR coming soon

Parsers for Chapters 4–6 (telex-style schedule messages) are planned as sister modules — shared data-element utilities are already in place. See the Roadmap for status.

Quick example ​

ts
import { parseScheduleDataSet } from 'iata-ssim/sds'

const dataSet = parseScheduleDataSet(text)

console.log(dataSet.carriers[0].carrier.airlineDesignator)
// → "XX" (2-letter IATA carrier code)

console.log(dataSet.carriers[0].flightLegs.length)
// → 2451

const leg = dataSet.carriers[0].flightLegs[0]
console.log(`${leg.airlineDesignator}${leg.flightNumber} ${leg.departure.station}→${leg.arrival.station}`)
// → "XX0100 AAA→BBB"
console.log(leg.daysOfOperation)
// → [1, 2, 3, 4, 5]

Terminology ​

SSIM covers nine chapters. "SSIM file" is industry shorthand for Chapter 7 — Schedule Data Set (SDS), the only format this library currently parses. Other chapters describe distinct telex-style messages (SSM, ASM, SCR) — see What is SDS? for the full picture and the Roadmap for upcoming support.