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# MPMediaEntity

The abstract superclass for media items, media item collections, and media playlist instances.

```
class MPMediaEntity
```

## Overview

This is the superclass for [`MPMediaItem`](/documentation/MediaPlayer/MPMediaItem) and [`MPMediaItemCollection`](/documentation/MediaPlayer/MPMediaItemCollection) instances, and in turn for [`MPMediaPlaylist`](/documentation/MediaPlayer/MPMediaPlaylist) instances.

## Topics

### Working with media properties

[`+  canFilterByProperty:`](/documentation/MediaPlayer/MPMediaEntity/canFilter(byProperty:))

Indicates whether you can use the media property key that you specify to construct a media property predicate.

[`-  enumerateValuesForProperties:usingBlock:`](/documentation/MediaPlayer/MPMediaEntity/enumerateValues(forProperties:using:))

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

[`persistentID`](/documentation/MediaPlayer/MPMediaEntity/persistentID)

The persistent identifier for a media entity.

[`-  objectForKeyedSubscript:`](/documentation/MediaPlayer/MPMediaEntity/subscript(_:))

Returns the object specified by the key.

[`-  valueForProperty:`](/documentation/MediaPlayer/MPMediaEntity/value(forProperty:))

Retrieves the value for a specified media property key.

[`MPMediaEntityPersistentID`](/documentation/MediaPlayer/MPMediaEntityPersistentID)

Defines the type for storing a persistent identifier to a particular entity.

### Media entity property keys

[Media entity property keys](/documentation/MediaPlayer/media-entity-property-keys)

The property keys used to retrieve metadata for media entities.

## Relationships

### Conforms To

[`Equatable`](/documentation/Swift/Equatable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`CVarArg`](/documentation/Swift/CVarArg)

[`NSCoding`](/documentation/Foundation/NSCoding)

[`NSSecureCoding`](/documentation/Foundation/NSSecureCoding)

[`Hashable`](/documentation/Swift/Hashable)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

### Inherited By

[`MPMediaItemCollection`](/documentation/MediaPlayer/MPMediaItemCollection)

[`MPMediaItem`](/documentation/MediaPlayer/MPMediaItem)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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