---
title: isMainProgramContent
framework: avfoundation
role: symbol
role_heading: Type Property
path: avfoundation/avmediacharacteristic/ismainprogramcontent
---

# isMainProgramContent

A media characteristic that indicates a track or media selection option includes content its author indicates is essential to the asset’s presentation.

## Declaration

```swift
static let isMainProgramContent: AVMediaCharacteristic
```

## Discussion

Discussion Example: an option that presents the main program audio for the presentation, regardless of locale, would typically have this characteristic. The value of this characteristic is public.main-program-content. The system infers the presence of this characteristic for a media option; it considers any option that doesn’t have the characteristic isAuxiliaryContent to be main content.

## See Also

### Content

- [isOriginalContent](avfoundation/avmediacharacteristic/isoriginalcontent.md)
- [isAuxiliaryContent](avfoundation/avmediacharacteristic/isauxiliarycontent.md)
- [machineGenerated](avfoundation/avmediacharacteristic/machinegenerated.md)