# Schema/Ontology

> A formal definition of the entity types and relationship types a knowledge graph may contain.

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

## category

- [Model Architecture](https://banes-lab.com/records/lex-category/model-architecture.md)

## referenced-by

- [Knowledge Graphs](https://banes-lab.com/records/arch/knowledge-graphs.md)