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# AWS::IoTSiteWise::AssetModel PropertyType
<a name="aws-properties-iotsitewise-assetmodel-propertytype"></a>

Contains a property type, which can be one of `attribute`, `measurement`, `metric`, or `transform`.

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

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

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

```
{
  "[Attribute](#cfn-iotsitewise-assetmodel-propertytype-attribute)" : Attribute,
  "[Metric](#cfn-iotsitewise-assetmodel-propertytype-metric)" : Metric,
  "[Transform](#cfn-iotsitewise-assetmodel-propertytype-transform)" : Transform,
  "[TypeName](#cfn-iotsitewise-assetmodel-propertytype-typename)" : String
}
```

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

```
  [Attribute](#cfn-iotsitewise-assetmodel-propertytype-attribute): 
    Attribute
  [Metric](#cfn-iotsitewise-assetmodel-propertytype-metric): 
    Metric
  [Transform](#cfn-iotsitewise-assetmodel-propertytype-transform): 
    Transform
  [TypeName](#cfn-iotsitewise-assetmodel-propertytype-typename): String
```

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

`Attribute`  <a name="cfn-iotsitewise-assetmodel-propertytype-attribute"></a>
Specifies an asset attribute property. An attribute generally contains static information, such as the serial number of an [IIoT](https://en.wikipedia.org/wiki/Internet_of_things#Industrial_applications) wind turbine.  
*Required*: No  
*Type*: [Attribute](aws-properties-iotsitewise-assetmodel-attribute.md)  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Metric`  <a name="cfn-iotsitewise-assetmodel-propertytype-metric"></a>
Specifies an asset metric property. A metric contains a mathematical expression that uses aggregate functions to process all input data points over a time interval and output a single data point, such as to calculate the average hourly temperature.  
*Required*: No  
*Type*: [Metric](aws-properties-iotsitewise-assetmodel-metric.md)  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Transform`  <a name="cfn-iotsitewise-assetmodel-propertytype-transform"></a>
Specifies an asset transform property. A transform contains a mathematical expression that maps a property's data points from one form to another, such as a unit conversion from Celsius to Fahrenheit.  
*Required*: No  
*Type*: [Transform](aws-properties-iotsitewise-assetmodel-transform.md)  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`TypeName`  <a name="cfn-iotsitewise-assetmodel-propertytype-typename"></a>
The type of property type, which can be one of `Attribute`, `Measurement`, `Metric`, or `Transform`.   
*Required*: Yes  
*Type*: String  
*Allowed values*: `Measurement | Attribute | Transform | Metric`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)