---
title: NEURLFilterPrefilter.PrefilterData
framework: networkextension
role: symbol
role_heading: Enumeration
path: networkextension/neurlfilterprefilter/prefilterdata
---

# NEURLFilterPrefilter.PrefilterData

An enumeration that represents Bloom filter data, as used by a prefilter.

## Declaration

```swift
enum PrefilterData
```

## Topics

### Accessing prefilter data

- [NEURLFilterPrefilter.PrefilterData.smallFilter(_:)](networkextension/neurlfilterprefilter/prefilterdata/smallfilter(_:).md)
- [NEURLFilterPrefilter.PrefilterData.temporaryFilepath(_:)](networkextension/neurlfilterprefilter/prefilterdata/temporaryfilepath(_:).md)

## See Also

### Working with prefilter properties

- [data](networkextension/neurlfilterprefilter/data.md)
- [tag](networkextension/neurlfilterprefilter/tag.md)
- [bitCount](networkextension/neurlfilterprefilter/bitcount.md)
- [hashCount](networkextension/neurlfilterprefilter/hashcount.md)
- [murmurSeed](networkextension/neurlfilterprefilter/murmurseed.md)