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::IoTSiteWise::AssetModel Attribute
<a name="aws-properties-iotsitewise-assetmodel-attribute"></a>

Contains an asset attribute property. For more information, see [Attributes](https://docs.amazonaws.cn/iot-sitewise/latest/userguide/asset-properties.html#attributes) in the *Amazon IoT SiteWise User Guide*.

## Syntax
<a name="aws-properties-iotsitewise-assetmodel-attribute-syntax"></a>

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

### JSON
<a name="aws-properties-iotsitewise-assetmodel-attribute-syntax.json"></a>

```
{
  "[DefaultValue](#cfn-iotsitewise-assetmodel-attribute-defaultvalue)" : String
}
```

### YAML
<a name="aws-properties-iotsitewise-assetmodel-attribute-syntax.yaml"></a>

```
  [DefaultValue](#cfn-iotsitewise-assetmodel-attribute-defaultvalue): String
```

## Properties
<a name="aws-properties-iotsitewise-assetmodel-attribute-properties"></a>

`DefaultValue`  <a name="cfn-iotsitewise-assetmodel-attribute-defaultvalue"></a>
The default value of the asset model property attribute. All assets that you create from the asset model contain this attribute value. You can update an attribute's value after you create an asset. For more information, see [Updating attribute values](https://docs.amazonaws.cn/iot-sitewise/latest/userguide/update-attribute-values.html) in the *Amazon IoT SiteWise User Guide*.  
*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)