<!--
{
  "availability" : [
    "iOS: 17.0.0 -",
    "iPadOS: 17.0.0 -",
    "macCatalyst: 17.0.0 -",
    "macOS: 14.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreLocation",
  "identifier" : "/documentation/CoreLocation/CLMonitor-2r51v/Event/refinement",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Core Location"
    ],
    "preciseIdentifier" : "s:12CoreLocation9CLMonitorC5EventV10refinementAA11CLCondition_pSgvp"
  },
  "title" : "refinement"
}
-->

# refinement

An optional instance of a condition that represents the most specific condition that this event can apply to.

```
let refinement: (any CLCondition)?
```

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)