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# AWS::Bedrock::AutomatedReasoningPolicy PolicyDefinitionVariable
<a name="aws-properties-bedrock-automatedreasoningpolicy-policydefinitionvariable"></a>

A variable defined within the policy that can be used in rules.

## Syntax
<a name="aws-properties-bedrock-automatedreasoningpolicy-policydefinitionvariable-syntax"></a>

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

### JSON
<a name="aws-properties-bedrock-automatedreasoningpolicy-policydefinitionvariable-syntax.json"></a>

```
{
  "[Description](#cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-description)" : {{String}},
  "[Name](#cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-name)" : {{String}},
  "[Type](#cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-type)" : {{String}}
}
```

### YAML
<a name="aws-properties-bedrock-automatedreasoningpolicy-policydefinitionvariable-syntax.yaml"></a>

```
  [Description](#cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-description): {{String}}
  [Name](#cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-name): {{String}}
  [Type](#cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-type): {{String}}
```

## Properties
<a name="aws-properties-bedrock-automatedreasoningpolicy-policydefinitionvariable-properties"></a>

`Description`  <a name="cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-description"></a>
A description of a variable defined in the policy.  
*Required*: Yes  
*Type*: String  
*Pattern*: `^[\s\S]+$`  
*Maximum*: `1024`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Name`  <a name="cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-name"></a>
The name of a variable defined in the policy.  
*Required*: Yes  
*Type*: String  
*Pattern*: `^[A-Za-z][A-Za-z0-9_]+$`  
*Minimum*: `1`  
*Maximum*: `64`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Type`  <a name="cfn-bedrock-automatedreasoningpolicy-policydefinitionvariable-type"></a>
The data type of a variable defined in the policy.  
*Required*: Yes  
*Type*: String  
*Pattern*: `^[A-Za-z][A-Za-z0-9_]+$`  
*Minimum*: `1`  
*Maximum*: `64`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)