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# identifier

The identifier associated with the string in your app’s custom vocabulary file.

```
optional var identifier: String? { get }
```

## Discussion

For phrases that are included in your app’s `AppIntentVocabulary.plist` file, this property contains the value of the `VocabularyItemIdentifier` key associated with that phrase. When determining the resolution for speakable strings, you can use this identifier (when present) to validate and resolve the term to a known phrase.

If the specified phrase was not defined in your vocabulary file, this property is `nil`.

---

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