# IndexingRuleValueUpdate
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 Update to an indexing rule. 

## 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.

 ** Probabilistic **   <a name="xray-Type-IndexingRuleValueUpdate-Probabilistic"></a>
 Indexing rule configuration that is used to probabilistically sample traceIds.   
Type: [ProbabilisticRuleValueUpdate](API_ProbabilisticRuleValueUpdate.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/xray-2016-04-12/IndexingRuleValueUpdate) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/xray-2016-04-12/IndexingRuleValueUpdate) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/xray-2016-04-12/IndexingRuleValueUpdate)