---
title: identifier
framework: webkit
role: symbol
role_heading: Instance Property
path: webkit/wkcontentrulelist/identifier
---

# identifier

The identifier for the rule list.

## Declaration

```swift
var identifier: String! { get }
```

## Discussion

Discussion You specify the identifier for your rule lists at compile time in the compileContentRuleList(forIdentifier:encodedContentRuleList:completionHandler:) method of WKContentRuleListStore. You also use this identifier to look up the rules list later.