# Canonical Definition

> The requirement that each fact have one authoritative definition that all consumers reference.

Record: `lex:canonical-definition`
Kind: constraint
Layer: [Contracts Core](https://banes-lab.com/records/layer/contracts-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lex-canonical-definition

## category

- [Schema / Canonical Data / Semantics](https://banes-lab.com/records/lex-category/schema-canonical-data-semantics.md)

## referenced-by

- [Single Source of Truth](https://banes-lab.com/records/arch/single-source-of-truth.md)