---
title: allowsExtendedAttributes
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/attributedstring/markdownparsingoptions/allowsextendedattributes
---

# allowsExtendedAttributes

A Boolean value that indicates whether parsing allows extensions to Markdown that specify extended attributes.

## Declaration

```swift
var allowsExtendedAttributes: Bool
```

## Discussion

Discussion If this value is false, the Markdown parser supports only the CommonMark syntax. The default is false.

## See Also

### Accessing Options

- [appliesSourcePositionAttributes](foundation/attributedstring/markdownparsingoptions/appliessourcepositionattributes.md)
- [failurePolicy](foundation/attributedstring/markdownparsingoptions/failurepolicy-swift.property.md)
- [AttributedString.MarkdownParsingOptions.FailurePolicy](foundation/attributedstring/markdownparsingoptions/failurepolicy-swift.enum.md)
- [interpretedSyntax](foundation/attributedstring/markdownparsingoptions/interpretedsyntax-swift.property.md)
- [AttributedString.MarkdownParsingOptions.InterpretedSyntax](foundation/attributedstring/markdownparsingoptions/interpretedsyntax-swift.enum.md)
- [languageCode](foundation/attributedstring/markdownparsingoptions/languagecode.md)