---
title: Unicode Fallback Sequencing Masks
framework: Core Services
role: containerSymbol
role_heading: Enumeration
platforms: [Mac Catalyst 17.0+, macOS 10.0+]
path: coreservices/1433622-unicode_fallback_sequencing_mask
---

# Unicode Fallback Sequencing Masks

Set or text for Unicode sequencing flag.

## Declaration

```occ
enum : unsigned int {
    ...
};
```

## Topics

### Constants

- [kUnicodeFallbackSequencingMask](coreservices/1433622-unicode_fallback_sequencing_mask/kunicodefallbacksequencingmask.md)
- [kUnicodeFallbackInterruptSafeMask](coreservices/1433622-unicode_fallback_sequencing_mask/kunicodefallbackinterruptsafemask.md)

## See Also

### Feature Selectors

- [Conversion Flags](coreservices/1433583-conversion_flags.md)
- [Conversion Masks](coreservices/1433493-conversion_masks.md)
- [Directionality Flags](coreservices/1433491-directionality_flags.md)
- [Directionality Masks](coreservices/1433620-directionality_masks.md)
- [Unicode Converter Flags](coreservices/1400304-unicode_converter_flags.md)
- [Unicode Converter Masks](coreservices/1400367-unicode_converter_masks.md)
- [Unicode Fallback Sequencing Flag](coreservices/1433597-unicode_fallback_sequencing_flag.md)
- [Unicode Matching Flags](coreservices/1433572-unicode_matching_flags.md)
- [Unicode Matching Masks](coreservices/1433554-unicode_matching_masks.md)
- [Fallback Handler Selectors](coreservices/1433507-fallback_handler_selectors.md)