# Schema

> A formal definition of the structure, types, and constraints of data.

Record: `lex:schema`
Kind: artifact
Layer: [Structural Core](https://banes-lab.com/records/layer/structural-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lex-schema

## category

- [Core Vocabulary](https://banes-lab.com/records/lex-category/core-vocabulary.md)

## referenced-by

- [API Contract](https://banes-lab.com/records/arch/api-contract.md)
- [Data Contract](https://banes-lab.com/records/arch/data-contract.md)
- [Self-Describing Structures](https://banes-lab.com/records/arch/self-describing-structures.md)
- [Input Validation](https://banes-lab.com/records/arch/input-validation.md)