---
title: Query Result Change Keys
framework: coreservices
role: collectionGroup
role_heading: API Collection
path: coreservices/file_metadata/mdquery/query_result_change_keys
---

# Query Result Change Keys

Specify the items that have changed in the query results.

## Topics

### Constants

- [kMDQueryUpdateAddedItems](coreservices/kmdqueryupdateaddeditems.md)
- [kMDQueryUpdateChangedItems](coreservices/kmdqueryupdatechangeditems.md)
- [kMDQueryUpdateRemovedItems](coreservices/kmdqueryupdateremoveditems.md)

## See Also

### Notification Info Keys

- [Query Search Scope Keys](coreservices/file_metadata/mdquery/query_search_scope_keys.md)
- [Result Relevance Sorting Key](coreservices/file_metadata/mdquery/result_relevance_sorting_key.md)