# Merge Policy

> A technique for declaring how two concurrent changes to one value are combined.

Record: `lexicon:merge-policy`
Kind: technique
Layer: [Atomic Boundary](https://banes-lab.com/records/layer/atomic-boundary.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-merge-policy

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Reconciliation Job](https://banes-lab.com/records/lexicon/reconciliation-job.md) and before [Transaction Isolation Level](https://banes-lab.com/records/lexicon/transaction-isolation-level.md).

## Category

- [Transactions / State / Concurrency](https://banes-lab.com/records/lexicon-category/transactions-state-concurrency.md)

## Refactors

- [Lost Update](https://banes-lab.com/records/architecture/lost-update.md)

## Linked from

- [Anti-patterns](https://banes-lab.com/ontology/principles/architecture-category-anti-patterns.md)