---
title: kUCKeyOutputSequenceIndexMask
framework: coreservices
role: symbol
role_heading: Global Variable
path: coreservices/kuckeyoutputsequenceindexmask
---

# kUCKeyOutputSequenceIndexMask

If the bit specified by this mask is set, the UCKeyOutput value contains an index into a structure of type UCKeySequenceDataIndex.

## Declaration

```swift
var kUCKeyOutputSequenceIndexMask: Int { get }
```