# Publisher

> A component that emits messages to a topic or bus for subscribers to receive.

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

## category

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

## referenced-by

- [Publish/Subscribe Pattern](https://banes-lab.com/records/arch/publish-subscribe-pattern.md)