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

# AWS::AppConfig::Deployment DynamicExtensionParameters
<a name="aws-properties-appconfig-deployment-dynamicextensionparameters"></a>

A map of dynamic extension parameter names to values to pass to associated extensions with `PRE_START_DEPLOYMENT` actions.

## Syntax
<a name="aws-properties-appconfig-deployment-dynamicextensionparameters-syntax"></a>

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

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

```
{
  "[ExtensionReference](#cfn-appconfig-deployment-dynamicextensionparameters-extensionreference)" : String,
  "[ParameterName](#cfn-appconfig-deployment-dynamicextensionparameters-parametername)" : String,
  "[ParameterValue](#cfn-appconfig-deployment-dynamicextensionparameters-parametervalue)" : String
}
```

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

```
  [ExtensionReference](#cfn-appconfig-deployment-dynamicextensionparameters-extensionreference): String
  [ParameterName](#cfn-appconfig-deployment-dynamicextensionparameters-parametername): String
  [ParameterValue](#cfn-appconfig-deployment-dynamicextensionparameters-parametervalue): String
```

## Properties
<a name="aws-properties-appconfig-deployment-dynamicextensionparameters-properties"></a>

`ExtensionReference`  <a name="cfn-appconfig-deployment-dynamicextensionparameters-extensionreference"></a>
The ARN or ID of the extension for which you are inserting a dynamic parameter.  
*Required*: No  
*Type*: String  
*Pattern*: `arn:(aws[a-zA-Z-]*)?:[a-z]+:((eusc-)?[a-z]{2}((-gov)|(-iso([a-z]?)))?-[a-z]+-\d{1})?:(\d{12})?:[a-zA-Z0-9-_/:.]+`  
*Minimum*: `20`  
*Maximum*: `2048`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`ParameterName`  <a name="cfn-appconfig-deployment-dynamicextensionparameters-parametername"></a>
The parameter name.  
*Required*: No  
*Type*: String  
*Minimum*: `1`  
*Maximum*: `64`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`ParameterValue`  <a name="cfn-appconfig-deployment-dynamicextensionparameters-parametervalue"></a>
The parameter value.  
*Required*: No  
*Type*: String  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)