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[Home](./index.md) &gt; [@empathyco/x-types](./x-types.md) &gt; [Suggestion](./x-types.suggestion.md) &gt; [key](./x-types.suggestion.key.md)

## Suggestion.key property

> Warning: This API is now obsolete.
> 
> - The key field should be calculated if needed using the `query` and the `facets` properties.
> 

Unique identifier of the suggestion.

**Signature:**

```typescript
key?: string;
```