# Joiner

> A formal definition of a caller that reads a live run's published result and its standing instead of starting a run of its own, with an empty write set.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Read Population](https://banes-lab.com/records/lexicon/read-population.md) and before [Liveness Witness](https://banes-lab.com/records/lexicon/liveness-witness.md).

## Category

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

## Required by

- [Read-Time Join](https://banes-lab.com/records/architecture/read-time-join.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)