# Signal Tag

> A formal definition of the tag for a file that defines a reactive value whose readers update when it changes, filed in a signals folder.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Emitter Tag](https://banes-lab.com/records/lexicon/emitter-tag.md) and before [Publisher Tag](https://banes-lab.com/records/lexicon/publisher-tag.md).

## Category

- [Application Concerns](https://banes-lab.com/records/lexicon-category/application-concerns.md)