---
title: ATSFlatDataMainHeaderBlock
framework: Application Services
role: symbol
role_heading: Structure
platforms: [macOS 10.2+]
path: applicationservices/atsflatdatamainheaderblock
---

# ATSFlatDataMainHeaderBlock

## Declaration

```swift
struct ATSFlatDataMainHeaderBlock
```

## Topics

### Initializers

- [init()](applicationservices/atsflatdatamainheaderblock/1460379-init.md)
- [init(version:sizeOfDataBlock:offsetToTextLayouts:offsetToStyleRuns:offsetToStyleList:)](applicationservices/atsflatdatamainheaderblock/1461857-init.md)

### Instance Properties

- [offsetToStyleList](applicationservices/atsflatdatamainheaderblock/1458944-offsettostylelist.md)
- [offsetToStyleRuns](applicationservices/atsflatdatamainheaderblock/1463892-offsettostyleruns.md)
- [offsetToTextLayouts](applicationservices/atsflatdatamainheaderblock/1458901-offsettotextlayouts.md)
- [sizeOfDataBlock](applicationservices/atsflatdatamainheaderblock/1464208-sizeofdatablock.md)
- [version](applicationservices/atsflatdatamainheaderblock/1460451-version.md)