---
title: reengagementOpenURLParameter
framework: adattributionkit
role: symbol
role_heading: Type Property
path: adattributionkit/postback/reengagementopenurlparameter
---

# reengagementOpenURLParameter

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

## Declaration

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

## Mentioned in

Receiving ad attributions and postbacks

## Discussion

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:    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 }    }