# Validate at the Boundary

> A technique for rejecting malformed input where it enters the system, so the core receives only valid values.

Record: `lexicon:validate-at-the-boundary`
Kind: technique
Layer: [Computation Core](https://banes-lab.com/records/layer/computation-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-validate-at-the-boundary

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Isolate Test State](https://banes-lab.com/records/lexicon/isolate-test-state.md) and before [Encapsulate Validation](https://banes-lab.com/records/lexicon/encapsulate-validation.md).

## Category

- [Correctness / Determinism / Verification](https://banes-lab.com/records/lexicon-category/correctness-determinism-verification.md)

## Refactors

- [Silent Data Corruption](https://banes-lab.com/records/architecture/silent-data-corruption.md)
- [Invariant](https://banes-lab.com/records/architecture/invariant.md)
- [Validation](https://banes-lab.com/records/architecture/validation.md)
- [Configuration Externalization](https://banes-lab.com/records/architecture/configuration-externalization.md)
- [Domain-Specific Language](https://banes-lab.com/records/architecture/domain-specific-language.md)

## Linked from

- [Anti-patterns](https://banes-lab.com/ontology/principles/architecture-category-anti-patterns.md)
- [Contracts / Interfaces / Compatibility](https://banes-lab.com/ontology/principles/architecture-category-contracts-interfaces-compatibility.md)
- [Correctness / Determinism / Verification](https://banes-lab.com/ontology/principles/architecture-category-correctness-determinism-verification.md)
- [Portability / Infrastructure / Deployment](https://banes-lab.com/ontology/principles/architecture-category-portability-infrastructure-deployment.md)
- [Metaprogramming / Language-Oriented Architecture](https://banes-lab.com/ontology/principles/architecture-category-metaprogramming-language-oriented-architecture.md)