---
title: Introduction to Uniform Type Identifiers Reference
framework: miscellaneous
role: article
path: apple-archive/documentation/Miscellaneous/Reference/UTIRef/Introduction
---

# Introduction to Uniform Type Identifiers Reference

Describes system-declared uniform type identifiers.

## Organization of This Document

This document is organized into the following chapters:

- [System-Declared Uniform Type Identifiers](../Articles/System-DeclaredUniformTypeIdentifiers.html#//apple_ref/doc/uid/TP40009259-SW1) describes UTIs defined by Apple.

## See Also

*[Uniform Type Identifiers Overview](../../../../FileManagement/Conceptual/understanding_utis/understand_utis_intro/understand_utis_intro.html#//apple_ref/doc/uid/TP40001319)* describes UTIs and how to use them.

*[UTType Reference](https://developer.apple.com/documentation/mobilecoreservices/uttype)* describes the functions used to manipulate UTIs.

[Next](../Articles/System-DeclaredUniformTypeIdentifiers.html)

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