---
title: kMDAttributeReadOnlyValues
framework: coreservices
role: symbol
role_heading: Global Variable
path: coreservices/kmdattributereadonlyvalues
---

# kMDAttributeReadOnlyValues

An array of strings containing the read-onlymetadata attribute keys, or NULL ifthe type is not known by the system.

## Declaration

```swift
let kMDAttributeReadOnlyValues: CFString!
```