---
title: kMDAttributeAllValues
framework: coreservices
role: symbol
role_heading: Global Variable
path: coreservices/kmdattributeallvalues
---

# kMDAttributeAllValues

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

## Declaration

```swift
let kMDAttributeAllValues: CFString!
```