The map room
Every company has a metric defined three ways — and spends the first twenty minutes of the QBR arguing about whose number is right. Your semantic layer governs the metric. CAIRN audits everything that cites it: the wiki that copied the definition and drifted, the onboarding doc with the folk formula, the deck from last quarter. The semantic layer is the law; CAIRN audits everything that cites the law.
Exhibit — the metric card
The ARR card ships in the corpus — all three definitions, each attributed to its source, never merged or averaged; unverifiable extractions were dropped and counted when it was sealed. Search it live. (Card distillation needs a model at CAIRN's side; the public box runs model-free by design.)
Beat two — the drift, confirmed
The Finance FAQ is a copy of the governed definition with the overages clause flipped — exactly how drift happens. The live audit surfaces the structural findings; with a local model at CAIRN's side, adjudication confirms the pair and the score drops because of it.
Beat three — the refusal
Ask for the CAC payback definition — a metric nobody ever wrote down. CAIRN refuses rather than inventing one, and seals the refusal.
curl -s -X POST https://data.cairnsemantics.com/api/answer \
-H 'content-type: application/json' \
-d '{"q":"Does ARR include usage overages?"}'