# Single-Unit Concern

> A formal definition of a concern with one instance per file, pairing a plural folder label with a singular file tag.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Collection Concern](https://banes-lab.com/records/lexicon/collection-concern.md) and before [Glob Resolvability](https://banes-lab.com/records/lexicon/glob-resolvability.md).

## Category

- [Taxonomy / Classification / Naming](https://banes-lab.com/records/lexicon-category/taxonomy-classification-naming.md)

## Required by

- [Concern-Folder Correspondence](https://banes-lab.com/records/architecture/concern-folder-correspondence.md)

## Linked from

- [Taxonomy / Classification / Naming](https://banes-lab.com/ontology/principles/architecture-category-taxonomy-classification-naming.md)
- [Taxonomy / Classification / Naming](https://banes-lab.com/ontology/lexicon/lexicon-category-taxonomy-classification-naming.md)