---
title: OSLogEntrySignpost.SignpostType.intervalBegin
framework: OSLog
role: symbol
role_heading: Case
platforms: [iOS 15.0+, iPadOS 15.0+, Mac Catalyst 15.0+, macOS 10.15+, tvOS 15.0+, visionOS 1.0+, watchOS 8.0+]
path: oslog/oslogentrysignpost/signposttype-swift.enum/intervalbegin
---

# OSLogEntrySignpost.SignpostType.intervalBegin

The signpost marks the start of a time interval.

## Declaration

```swift
case intervalBegin
```

## See Also

### Enumeration Cases

- [OSLogEntrySignpost.SignpostType.undefined](oslog/oslogentrysignpost/signposttype-swift.enum/undefined.md)
- [OSLogEntrySignpost.SignpostType.intervalEnd](oslog/oslogentrysignpost/signposttype-swift.enum/intervalend.md)
- [OSLogEntrySignpost.SignpostType.event](oslog/oslogentrysignpost/signposttype-swift.enum/event.md)