---
title: keySpace
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avmutablemetadataitem/keyspace
---

# keySpace

The key space of the metadata item’s key.

## Declaration

```swift
var keySpace: AVMetadataKeySpace? { get set }
```

## Discussion

Discussion The key space that this property value specifies is typically the default key space for the metadata container that stores the metadata item.

## See Also

### Accessing keys and key spaces

- [key](avfoundation/avmutablemetadataitem/key.md)