---
title: kMDQueryDidUpdateNotification
framework: coreservices
role: symbol
role_heading: Global Variable
path: coreservices/kmdquerydidupdatenotification
---

# kMDQueryDidUpdateNotification

Notification posted to indicate that a change has occurred to the query’s results list during the live-update phase of a query’s execution.

## Declaration

```swift
let kMDQueryDidUpdateNotification: CFString!
```