Data contract v0.1

Status classes

verified

OEM product page, manual, or PDF.

secondary

Reputable dealer, review, or official distributor measurement.

conflict

Credible sources disagree. No average is created.

unverified

No sufficiently reliable retained value.

n/a

The field does not meaningfully apply.

Identity rules

Brand plus reference is the internal key. A sister reference names the exact split field. Market data never enters the canonical specification. Empty beats unsourced. OEM case length is not silently renamed measured lug-to-lug.