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::AppConfig::ExperimentDefinition Treatment
<a name="aws-properties-appconfig-experimentdefinition-treatment"></a>

Describes a treatment in an experiment, including its traffic allocation weight and feature flag value.

## Syntax
<a name="aws-properties-appconfig-experimentdefinition-treatment-syntax"></a>

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

### JSON
<a name="aws-properties-appconfig-experimentdefinition-treatment-syntax.json"></a>

```
{
  "[AttributeValues](#cfn-appconfig-experimentdefinition-treatment-attributevalues)" : {{{{{Key}}: {{Value}}, ...}}},
  "[Description](#cfn-appconfig-experimentdefinition-treatment-description)" : {{String}},
  "[Enabled](#cfn-appconfig-experimentdefinition-treatment-enabled)" : {{Boolean}},
  "[Key](#cfn-appconfig-experimentdefinition-treatment-key)" : {{String}},
  "[Weight](#cfn-appconfig-experimentdefinition-treatment-weight)" : {{Number}}
}
```

### YAML
<a name="aws-properties-appconfig-experimentdefinition-treatment-syntax.yaml"></a>

```
  [AttributeValues](#cfn-appconfig-experimentdefinition-treatment-attributevalues): {{
    {{Key}}: {{Value}}}}
  [Description](#cfn-appconfig-experimentdefinition-treatment-description): {{String}}
  [Enabled](#cfn-appconfig-experimentdefinition-treatment-enabled): {{Boolean}}
  [Key](#cfn-appconfig-experimentdefinition-treatment-key): {{String}}
  [Weight](#cfn-appconfig-experimentdefinition-treatment-weight): {{Number}}
```

## Properties
<a name="aws-properties-appconfig-experimentdefinition-treatment-properties"></a>

`AttributeValues`  <a name="cfn-appconfig-experimentdefinition-treatment-attributevalues"></a>
Property description not available.  
*Required*: No  
*Type*: Object of [AttributeValue](aws-properties-appconfig-experimentdefinition-attributevalue.md)  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Description`  <a name="cfn-appconfig-experimentdefinition-treatment-description"></a>
A description of the treatment.  
*Required*: No  
*Type*: String  
*Maximum*: `1024`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Enabled`  <a name="cfn-appconfig-experimentdefinition-treatment-enabled"></a>
Property description not available.  
*Required*: Yes  
*Type*: Boolean  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Key`  <a name="cfn-appconfig-experimentdefinition-treatment-key"></a>
The unique key that identifies this treatment.  
*Required*: No  
*Type*: String  
*Pattern*: `^[a-zA-Z0-9]{1,8}`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Weight`  <a name="cfn-appconfig-experimentdefinition-treatment-weight"></a>
The traffic allocation weight for this treatment.  
*Required*: Yes  
*Type*: Number  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)