# core/predicates/representation.predicate.ts

> 4 lines of code and 1 definition.

Tree: GovLab Patterns
Language: typescript
Layer: infrastructure
Canonical: https://banes-lab.com/anatomy/patterns#file-patterns-core-predicates-representation-predicate-ts
Source text: https://banes-lab.com/source/patterns/core/predicates/representation.predicate.ts.txt

Listed in [core/predicates](https://banes-lab.com/api/source/patterns/core/predicates.md), after [core/predicates/record.predicate.ts](https://banes-lab.com/source/patterns/core/predicates/record.predicate.ts.md) and before [core/predicates/schema.predicate.ts](https://banes-lab.com/source/patterns/core/predicates/schema.predicate.ts.md).

## Definitions

- `isRepresentation` (lexical_declaration, line 3, exported)

## Contained in

- [core/predicates](https://banes-lab.com/anatomy/patterns/folder-patterns-core-predicates.md)

## Uses

- [core/selectors/representation.selector.ts](https://banes-lab.com/source/patterns/core/selectors/representation.selector.ts.md)

## Linked from

- [core/selectors](https://banes-lab.com/anatomy/patterns/folder-patterns-core-selectors.md)

## Source

```typescript
import { runtimeFor } from "#core/selectors/representation.selector";

export const isRepresentation = function isRepresentation(value: unknown): value is string {
    return typeof value === "string" && runtimeFor(value) !== undefined;
};
```