This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::IoTEvents::DetectorModel AssetPropertyTimestamp
<a name="aws-properties-iotevents-detectormodel-assetpropertytimestamp"></a>

A structure that contains timestamp information. For more information, see [TimeInNanos](https://docs.amazonaws.cn/iot-sitewise/latest/APIReference/API_TimeInNanos.html) in the *Amazon IoT SiteWise API Reference*.

You must use expressions for all parameters in `AssetPropertyTimestamp`. The expressions accept literals, operators, functions, references, and substitution templates.

**Examples**
+ For literal values, the expressions must contain single quotes. For example, the value for the `timeInSeconds` parameter can be `'1586400675'`.
+ For references, you must specify either variables or input values. For example, the value for the `offsetInNanos` parameter can be `$variable.time`.
+ For a substitution template, you must use `${}`, and the template must be in single quotes. A substitution template can also contain a combination of literals, operators, functions, references, and substitution templates.

  In the following example, the value for the `timeInSeconds` parameter uses a substitution template.

   `'${$input.TemperatureInput.sensorData.timestamp / 1000}'` 

For more information, see [Expressions](https://docs.amazonaws.cn/iotevents/latest/developerguide/iotevents-expressions.html) in the *Amazon IoT Events Developer Guide*.

## Syntax
<a name="aws-properties-iotevents-detectormodel-assetpropertytimestamp-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-iotevents-detectormodel-assetpropertytimestamp-syntax.json"></a>

```
{
  "[OffsetInNanos](#cfn-iotevents-detectormodel-assetpropertytimestamp-offsetinnanos)" : {{String}},
  "[TimeInSeconds](#cfn-iotevents-detectormodel-assetpropertytimestamp-timeinseconds)" : {{String}}
}
```

### YAML
<a name="aws-properties-iotevents-detectormodel-assetpropertytimestamp-syntax.yaml"></a>

```
  [OffsetInNanos](#cfn-iotevents-detectormodel-assetpropertytimestamp-offsetinnanos): {{String}}
  [TimeInSeconds](#cfn-iotevents-detectormodel-assetpropertytimestamp-timeinseconds): {{String}}
```

## Properties
<a name="aws-properties-iotevents-detectormodel-assetpropertytimestamp-properties"></a>

`OffsetInNanos`  <a name="cfn-iotevents-detectormodel-assetpropertytimestamp-offsetinnanos"></a>
The nanosecond offset converted from `timeInSeconds`. The valid range is between 0-999999999.  
*Required*: No  
*Type*: String  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`TimeInSeconds`  <a name="cfn-iotevents-detectormodel-assetpropertytimestamp-timeinseconds"></a>
The timestamp, in seconds, in the Unix epoch format. The valid range is between 1-31556889864403199.  
*Required*: Yes  
*Type*: String  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)