# Boundary Tag

> A formal definition of the tag for a file that marks where one module's responsibility ends and checks what crosses it, filed in a boundaries folder.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Port Tag](https://banes-lab.com/records/lexicon/port-tag.md) and before [Interface Tag](https://banes-lab.com/records/lexicon/interface-tag.md).

## Category

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