# Concern Partition

> A formal definition of how a body of work divides into concerns, derived from a coupling relation that joins two surfaces when a change to one forces a change to the other.

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

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

## Category

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

## Required by

- [Derived Party Count](https://banes-lab.com/records/architecture/derived-party-count.md)

## Linked from

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

## Evidence in the code

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