# EntityRecognizerMetadata
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Detailed information about an entity recognizer.

## Contents
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 ** EntityTypes **   <a name="comprehend-Type-EntityRecognizerMetadata-EntityTypes"></a>
Entity types from the metadata of an entity recognizer.  
Type: Array of [EntityRecognizerMetadataEntityTypesListItem](API_EntityRecognizerMetadataEntityTypesListItem.md) objects  
Required: No

 ** EvaluationMetrics **   <a name="comprehend-Type-EntityRecognizerMetadata-EvaluationMetrics"></a>
Detailed information about the accuracy of an entity recognizer.  
Type: [EntityRecognizerEvaluationMetrics](API_EntityRecognizerEvaluationMetrics.md) object  
Required: No

 ** NumberOfTestDocuments **   <a name="comprehend-Type-EntityRecognizerMetadata-NumberOfTestDocuments"></a>
 The number of documents in the input data that were used to test the entity recognizer. Typically this is 10 to 20 percent of the input documents.  
Type: Integer  
Required: No

 ** NumberOfTrainedDocuments **   <a name="comprehend-Type-EntityRecognizerMetadata-NumberOfTrainedDocuments"></a>
 The number of documents in the input data that were used to train the entity recognizer. Typically this is 80 to 90 percent of the input documents.  
Type: Integer  
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/comprehend-2017-11-27/EntityRecognizerMetadata) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/comprehend-2017-11-27/EntityRecognizerMetadata) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/comprehend-2017-11-27/EntityRecognizerMetadata)