# Concern Tag

> A formal definition of the role a file plays, drawn from the closed concern vocabulary and carried as the last dot-segment before the extension.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Shared Invocation](https://banes-lab.com/records/lexicon/shared-invocation.md) and before [Subject Slot](https://banes-lab.com/records/lexicon/subject-slot.md).

## Category

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

## Required by

- [Positional Slot Resolution](https://banes-lab.com/records/architecture/positional-slot-resolution.md)
- [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)