---
title: begin
framework: os
role: symbol
role_heading: Type Property
path: os/ossignposttype/begin
---

# begin

A signpost that marks the start of a time interval of interest in your code.

## Declaration

```swift
static let begin: OSSignpostType
```

## See Also

### Specifying Signpost Types

- [end](os/ossignposttype/end.md)
- [event](os/ossignposttype/event.md)