# Event Contract

> The agreed schema and semantics of an event that publishers and subscribers both honor.

Record: `lex:event-contract`
Kind: constraint
Layer: [Execution Core](https://banes-lab.com/records/layer/execution-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lex-event-contract

## category

- [Event Messaging Async](https://banes-lab.com/records/lex-category/event-messaging-async.md)

## referenced-by

- [Event Bus](https://banes-lab.com/records/arch/event-bus.md)