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# NSCharacterEncodingDocumentOption

The string encoding.

```
extern NSAttributedStringDocumentReadingOptionKey NSCharacterEncodingDocumentOption;
```

## Discussion

For plain text documents; <doc://com.apple.documentation/documentation/Foundation/NSNumber> containing the unsigned int <doc://com.apple.documentation/documentation/Foundation/NSStringEncoding> to override any encoding specified in an HTML document. The previous string constant was `@"CharacterEncoding"`.

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