<!--
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    "iOS: 18.0.0 -",
    "iPadOS: 18.0.0 -",
    "macCatalyst: -"
  ],
  "documentType" : "symbol",
  "framework" : "AdAttributionKit",
  "identifier" : "/documentation/AdAttributionKit/Postback/reengagementOpenURLParameter",
  "metadataVersion" : "0.1.0",
  "role" : "Type Property",
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    "modules" : [
      "AdAttributionKit"
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  "title" : "reengagementOpenURLParameter"
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-->

# reengagementOpenURLParameter

A string that represents the query parameter that AdAttributionKit appends to the URL to indicate that a reengagement has
occurred.

```
static var reengagementOpenURLParameter: String { get }
```

## Discussion

When your advertised app receives a universal link, determine whether it came from an AdAttributionKit reengagement by
checking the query parameters for a key containing this string, as the example below shows:

```swift
   func isAdAttributionKitReengagementURL(url: URL) -> Bool {
       guard let components = URLComponents(url: url, resolvingAgainstBaseURL: true),
             let queryItems = components.queryItems else {
           return false
       }
       return queryItems.contains { $0.name == Postback.reengagementOpenURLParameter }
   }
```

---

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