What is the uniform type identifier for ePub files?

Question

What is the UTI for .epub files?

Read the Developer Library and can't find it anywhere else.

Answer 1

The “Uniform Type Identifiers” framework defines constants for system defined types, such as epub:

A type that represents EPUB format data. The identifier for this type is org.idpf.epub-container.

One can obtain the type identifier at runtime with

import UniformTypeIdentifiers

print(UTType.epub)
// org.idpf.epub-container

Another way is to inspect the Info.plist from an application which can open EPUB files, such as the Books application:

...
<key>LSItemContentTypes</key>
<array>
    <string>org.idpf.epub-container</string>
</array>
...