# Trait Tag

> A formal definition of the tag for a file that declares a named set of behaviors a type can implement, filed in a traits folder.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Mixin Tag](https://banes-lab.com/records/lexicon/mixin-tag.md) and before [Composite Tag](https://banes-lab.com/records/lexicon/composite-tag.md).

## Category

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