# Subject Slot

> A facility that names who or what a file serves, occupying the first dot-segment of the filename.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Concern Tag](https://banes-lab.com/records/lexicon/concern-tag.md) and before [Variant Slot](https://banes-lab.com/records/lexicon/variant-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)
- [Sanctioned Generic Subject](https://banes-lab.com/records/architecture/sanctioned-generic-subject.md)

## Linked from

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