---
title: startTimeColumnID
framework: createmlcomponents
role: symbol
role_heading: Instance Property
path: createmlcomponents/dataframetemporalannotationparameters/starttimecolumnid
---

# startTimeColumnID

The column id that contains the start time. The default value is nil.

## Declaration

```swift
var startTimeColumnID: ColumnID<Double>?
```

## See Also

### Getting the properties

- [annotationColumnID](createmlcomponents/dataframetemporalannotationparameters/annotationcolumnid.md)
- [endTimeColumnID](createmlcomponents/dataframetemporalannotationparameters/endtimecolumnid.md)
- [filePathColumnID](createmlcomponents/dataframetemporalannotationparameters/filepathcolumnid.md)
- [filePathType](createmlcomponents/dataframetemporalannotationparameters/filepathtype-swift.property.md)