From the blog

#validation

2 articles tagged #validation.

A vertical stack of SSIM record lines with the final trailer row highlighted and matched against a record count, in Active Flights brand violet on near-black.
SSIM & Schedules·

The trailer record: the checksum you shouldn't skip

The last line of an SSIM file — the record type 5 trailer — is easy to ignore, and it's how you know the file arrived whole. Here's what it carries and why checking it is basic hygiene.

#ssim#record-types#file-integrity#validation
A validation panel listing schedule issues, some flagged as real errors and some acknowledged as known conventions, in Active Flights brand amber on near-black.
SSIM & Schedules·

The data-quality edge cases that break schedule parsers

A field guide to the real-world quirks in SSIM feeds — time modes, overnight arrivals, DST, operational suffixes, season edges — that turn a 'simple' fixed-width parser into a maintenance treadmill.

#ssim#data-quality#validation#edge-cases