# Carrier Field

> A formal definition of a field whose consumers are mechanisms and whose value is drawn from a closed set or is an identifier.

Record: `lexicon:carrier-field`
Kind: artifact
Layer: [Execution Core](https://banes-lab.com/records/layer/execution-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-carrier-field

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Derivation Period](https://banes-lab.com/records/lexicon/derivation-period.md) and before [Payload Field](https://banes-lab.com/records/lexicon/payload-field.md).

## Category

- [Coordination Surfaces](https://banes-lab.com/records/lexicon-category/coordination-surfaces.md)

## Required by

- [Carrier and Payload Split](https://banes-lab.com/records/architecture/carrier-and-payload-split.md)
- [Joinable Mandated Field](https://banes-lab.com/records/architecture/joinable-mandated-field.md)

## Linked from

- [Coordination Surfaces](https://banes-lab.com/ontology/principles/architecture-category-coordination-surfaces.md)

## Evidence in the code

- [models/substrate.model.md](https://banes-lab.com/source/coordination/models/substrate.model.md.md)