# AutomatedReasoningPolicyDefinitionElement
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Represents a single element in an Automated Reasoning policy definition, such as a rule, variable, or type definition.

## Contents
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**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** policyDefinitionRule **   <a name="bedrock-Type-AutomatedReasoningPolicyDefinitionElement-policyDefinitionRule"></a>
A rule element within the policy definition that contains a formal logical expression used for validation.  
Type: [AutomatedReasoningPolicyDefinitionRule](API_AutomatedReasoningPolicyDefinitionRule.md) object  
Required: No

 ** policyDefinitionType **   <a name="bedrock-Type-AutomatedReasoningPolicyDefinitionElement-policyDefinitionType"></a>
A custom type element within the policy definition that defines a set of possible values for variables.  
Type: [AutomatedReasoningPolicyDefinitionType](API_AutomatedReasoningPolicyDefinitionType.md) object  
Required: No

 ** policyDefinitionVariable **   <a name="bedrock-Type-AutomatedReasoningPolicyDefinitionElement-policyDefinitionVariable"></a>
A variable element within the policy definition that represents a concept used in logical expressions and rules.  
Type: [AutomatedReasoningPolicyDefinitionVariable](API_AutomatedReasoningPolicyDefinitionVariable.md) object  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/bedrock-2023-04-20/AutomatedReasoningPolicyDefinitionElement) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-2023-04-20/AutomatedReasoningPolicyDefinitionElement) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-2023-04-20/AutomatedReasoningPolicyDefinitionElement)