---
title: identifier
framework: networkextension
role: symbol
role_heading: Instance Property
path: networkextension/nefilterflow/identifier
---

# identifier

The unique identifier of the flow.

## Declaration

```swift
var identifier: UUID { get }
```

## See Also

### Inspecting flow properties

- [url](networkextension/nefilterflow/url.md)
- [direction](networkextension/nefilterflow/direction.md)
- [NETrafficDirection](networkextension/netrafficdirection.md)
- [NEFilterFlowBytesMax](networkextension/nefilterflowbytesmax.md)