# Assertion Tag

> A formal definition of the tag for a file that defines reusable checks tests apply to outcomes, filed in an assertions folder.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Double Tag](https://banes-lab.com/records/lexicon/double-tag.md) and before [Harness Tag](https://banes-lab.com/records/lexicon/harness-tag.md).

## Category

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