# Reducer Tag

> A formal definition of the tag for a file that computes the next state from the current state and an action, filed in a reducers folder.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Store Tag](https://banes-lab.com/records/lexicon/store-tag.md) and before [Mutation Tag](https://banes-lab.com/records/lexicon/mutation-tag.md).

## Category

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