# MetricDefinition


Information about the model metric that is reported for a trained model.

## Contents


 ** name **   <a name="API-Type-MetricDefinition-name"></a>
The name of the model metric.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Pattern: `.+`   
Required: Yes

 ** regex **   <a name="API-Type-MetricDefinition-regex"></a>
The regular expression statement that defines how the model metric is reported.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 500.  
Pattern: `.+`   
Required: Yes

## See Also


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/cleanroomsml-2023-09-06/MetricDefinition) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/cleanroomsml-2023-09-06/MetricDefinition) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/cleanroomsml-2023-09-06/MetricDefinition)