# Read Population

> A formal definition of the set a run read and publishes with its result, which a later caller tests to decide whether that result answers its own question.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Write Scope](https://banes-lab.com/records/lexicon/write-scope.md) and before [Joiner](https://banes-lab.com/records/lexicon/joiner.md).

## Category

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

## Required by

- [Write Scope and Read Population](https://banes-lab.com/records/architecture/write-scope-and-read-population.md)
- [Read-Time Join](https://banes-lab.com/records/architecture/read-time-join.md)
- [Single Aggregate](https://banes-lab.com/records/architecture/single-aggregate.md)

## Linked from

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

## Evidence in the code

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