# BedrockEvaluatorModel
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The evaluator model used in knowledge base evaluation job or in model evaluation job that use a model as judge. This model computes all evaluation related metrics.

## Contents
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 ** modelIdentifier **   <a name="bedrock-Type-BedrockEvaluatorModel-modelIdentifier"></a>
The Amazon Resource Name (ARN) of the evaluator model used used in knowledge base evaluation job or in model evaluation job that use a model as judge.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 2048.  
Pattern: `(arn:aws(-[^:]+)?:bedrock:[a-z0-9-]{1,20}:((:foundation-model/[a-z0-9-]{1,63}[.]{1}[a-z0-9-]{1,63}([.:]?[a-z0-9-]{1,63}))|([0-9]{12}:inference-profile/(([a-z-]{2,8}.)[a-z0-9-]{1,63}[.]{1}[a-z0-9-]{1,63}([.:]?[a-z0-9-]{1,63})))))$|(^[a-z0-9-]+[.][a-z0-9-]+([.][a-z0-9-]+)*(:[a-z0-9-]+)?$)|^[a-z0-9-]{1,63}[.]{1}[a-z0-9-]{1,63}([a-z0-9-]{1,63}[.]){0,2}[a-z0-9-]{1,63}([:][a-z0-9-]{1,63}){0,2}(/[a-z0-9]{12}|)`   
Required: Yes

## 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/BedrockEvaluatorModel) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-2023-04-20/BedrockEvaluatorModel) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-2023-04-20/BedrockEvaluatorModel)