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# ITLibMediaEntity

This class describes a media entity, which can be a media item, such as an audio track.

```
class ITLibMediaEntity
```

## Overview> Note:
> Entity properties are specific to each type of entity, and each specific entity class provides individual accessors for its properties.

Each media entity has a persistent unique ID and set of properties that iTunes assigns.

The `ITLibMediaEntity` class serves as the abstract superclass for [`ITLibMediaItem`](/documentation/iTunesLibrary/ITLibMediaItem) and [`ITLibPlaylist`](/documentation/iTunesLibrary/ITLibPlaylist) instances.

## Topics

### Essentials

[`persistentID`](/documentation/iTunesLibrary/ITLibMediaEntity/persistentID)

The unique identifier of the media entity.

### Getting Media Item Properties

[`enumerateValues(forProperties:using:)`](/documentation/iTunesLibrary/ITLibMediaEntity/enumerateValues(forProperties:using:))

Executes a provided block with the fetched values for the item properties.

[`enumerateValuesExcept(forProperties:using:)`](/documentation/iTunesLibrary/ITLibMediaEntity/enumerateValuesExcept(forProperties:using:))

Executes a provided block with the fetched values for all properties in the entity except for the provided set.

[`value(forProperty:)`](/documentation/iTunesLibrary/ITLibMediaEntity/value(forProperty:))

Gets the value for a specified media property key.


---

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