---
title: Type
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/closed_captioning_sample_data/type
---

# Type

A 32-bit integer that identifies the atom type.

## Overview

Overview This field must be set to 'cdat'. note: Apple reserves all atom types with lowercase letters and numbers.

## See Also

### Data fields

- [Size](quicktime-file-format/closed_captioning_sample_data/size.md)
- [Sample data](quicktime-file-format/closed_captioning_sample_data/sample_data.md)