---
title: baseURI
framework: avfoundation
role: symbol
role_heading: Type Property
path: avfoundation/avmetadataextraattributekey/baseuri
---

# baseURI

A key that identifies the base URI the item uses to resolve its related URIs.

## Declaration

```swift
static let baseURI: AVMetadataExtraAttributeKey
```

## See Also

### Extra attribute keys

- [valueURI](avfoundation/avmetadataextraattributekey/valueuri.md)
- [info](avfoundation/avmetadataextraattributekey/info.md)